Shop by Size: Includes size chart notes

Beads Size Chart

Bead size chart with U.S. quarter reference coin diameter 24.26 mm

Bead Hole Size and Thread Matching Guide

Bead size and bead hole size are separate measurements. A 10mm bead can still have a small center opening, while a smaller component may accept thicker cord. Use this bead hole size chart to compare the checks that matter for elastic cord, nylon cord, beading wire, needles, and beadable pen hardware. Then confirm the selected product's listed opening and leave enough clearance for knots, doubled strands, coatings, or repeated passes.

Tiny Beads Check the selected product's opening together with the needle eye, thread thickness, and number of passes. Outside size alone does not confirm fit.

Bracelet Beads Choose cord from the smallest opening in the finished design, not from the outside bead size. Allow extra clearance for knots, doubled strands, and repeated passes.

Large-Hole Beads Compare the selected product's listed opening before using thicker cord, visible knots, stacked strands, or repeated passes.

Beadable Pens Check the selected bead or topper against the actual pen rod diameter, center opening, bead height, and orientation. Do not assume one opening size fits every pen project.

Bead Hole Size Reference Chart

These bead hole sizes are product-specific. Outside size can help you browse, but material, shape, coating, drilling, polishing, and batch variation can change the usable opening. Use the chart as a checking sequence, then confirm the selected product.

Bead Type / Outside-Size Range	Product Details to Check	Stringing / Hardware Check	Suitable Projects / Notes
Mini seed beads and 1.5–2mm small beads	Listed center opening; brand, shape, coating, and batch	Needle eye, thread thickness, and required number of passes	Detailed patterns and lightweight accents only after the selected product and complete thread setup are checked.
2–4mm acrylic beads, glass beads, and resin beads	Listed opening, shape, drilling, coating, and edge finish	Compare the complete needle/thread, elastic, nylon, or wire setup	Light bracelets, earrings, small charms, and layered layouts when the selected item passes freely.
5–6mm acrylic beads, glass beads, and resin beads	Listed opening, shape, thickness, drilling, and edge finish	Check the complete cord, thread, or wire diameter and any planned knot or repeated pass	Light jewelry, earrings, small keychains, and simple projects after the selected product is checked.
8–12mm round beads, spacer beads, and pearl-style beads	Listed opening, shape, thickness, construction, and product-specific fit notes	Check the smallest opening in the full design, including spacers and findings	Bracelets, necklaces, bag charms, and beginner projects when every selected component passes freely.
14–20mm large beads, barrel beads, and large spacer beads	Listed opening, weight, thickness, hole orientation, and edge finish	Check cord or hardware diameter plus knots, connectors, and repeated passes	Bold bracelets, keychains, hanging projects, and larger designs after weight and hardware are checked.
Ceramic and other drilled components	Product-specific opening, drilling variation, edge finish, construction, and weight	Test the selected cord, wire, needle, and number of passes without forcing	Use only after the individual product and complete stringing setup are checked.
Large craft components with wider openings	Listed opening, edge finish, weight, attachment direction, and hardware notes	Compare the complete connector, cord, knot, or rigid hardware	Hanging pieces and larger accessories when the attachment point and finished weight are suitable.
Beadable pen project beads and pen toppers	Product-specific center opening, bead height, orientation, and fit notes	Compare with the actual pen rod or compatible hardware; do not force the component	Use the product page or a verified bead-and-hardware test instead of relying on outside size alone.

Thread and Cord Matching Guide

The selected opening needs usable clearance around the full thread, cord, wire, needle, knot, crimp, or rod setup. A material's listed diameter is only one input; doubled strands, coatings, connectors, and repeated passes can require more room.

Thread / Cord Type	Clearance Factors to Check	Product Details to Verify	Typical Project Use
0.2mm elastic cord	Full cord diameter, knot plan, doubled strands, and any needle used	Selected bead opening, coating, edge finish, and required passes	Small stretch bracelets and lightweight beadwork after the exact product opening is checked.
0.3–0.4mm elastic cord	Full cord diameter, knot or crimp plan, and whether the strand doubles back	Selected product opening, shape, drilling, and edge finish	Simple bracelets, small beaded rings, and lightweight jewelry when the chosen components pass freely.
0.5mm elastic cord / jade cord / nylon cord	Full cord diameter, knot size, doubled strands, and connectors	The smallest listed opening across every bead and spacer in the design	Everyday stretch bracelets and similar projects only after the complete layout is checked.
0.7–0.8mm elastic cord or nylon cord	Full material diameter, knot bulk, coatings, and any repeated pass	Selected product opening, edge finish, and project hardware	Heavier layouts that have enough verified clearance and suitable hardware.
1.0mm thick cord, waxed cord, cotton cord, or leather cord	Cord diameter plus knot, splice, connector, and surface texture	Selected product opening, edge finish, orientation, and attachment method	Keychains, hanging decorations, macramé-style projects, and bold accessories after a pass-through check.
Beading wire / coated jewelry wire	Full coated diameter, flexibility, crimp or closure plan, and any return pass	The smallest opening in the selected beads, spacers, and findings	Necklaces and bracelets with clasps after the complete wire and component combination is checked.
Memory wire	Actual wire diameter, rigid curvature, cut end, and whether the component can slide without forcing	Every selected component's opening, edge finish, and orientation	Bracelets, rings, and loops when all components pass over the rigid wire safely.
Pen rod / beadable pen core	Actual rod diameter, center opening, bead height, orientation, and top hardware	Use product-specific fit notes or a verified bead-and-pen test	Beadable pen projects only after the exact bead or topper and pen hardware are checked.

Important: This chart is a selection method, not a compatibility guarantee. The same outside size can include products with different openings, shapes, coatings, drilling, and edge finishes. Check the selected product and the complete stringing or hardware setup; leave additional clearance for knots, doubled strands, crimps, repeated passes, or rigid rods.

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Shop by Size

The Zoediy store offers a wide range of sizes. Simply enter the size you need in the search box, such as “8mm,” and all products in the 8mm size will be displayed, making it very convenient to find what you need.

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Choose the scale, opening, and material for the finished project

Choosing the Right Bead Size for Different Projects

A useful bead size guide should help you compare more than one number. Start with the outside diameter, then check the center opening, shape, thickness, material, finished weight, and the space needed for knots or hardware. The bead sizes in mm shown in the product area above are shopping categories. Use the selected product and variant as the source for its listed dimensions, opening, pack quantity, net weight, and compatibility notes.

Smaller pieces work well for detailed patterns, earrings, and light layered accents. Medium options are easier to handle for bracelets, keychains, bag charms, and handmade gifts. Larger pieces create stronger focal points but need more room, stronger hardware, and a careful weight check.

Match the visual scale

Use smaller diameters for detailed layouts and larger diameters for focal pieces. Shape and thickness can make two components with the same listed size look different.

Check the opening separately

A large outside diameter does not guarantee a large hole. Confirm the cord, wire, rod, knot, and repeated-pass clearance before ordering.

Compare material and weight

Material, construction, shape, thickness, coatings, and added hardware can all affect finished weight. When weight matters, compare the selected product and variant instead of applying one weight rule to an entire material family.

Common starting points

For lighter jewelry and detailed combinations, compare 6mm beads. An 8mm bead gives a more visible medium scale, while 10mm beads and 12mm beads create a bolder result. These are outside-size categories, not hole-size guarantees.

4mm Beads 6mm Beads 8mm Beads 10mm Beads 12mm Beads 16mm Beads 20mm Beads

Plan around the finished use

Bracelets need wrist comfort, knot allowance, spacer width, and a cord that can move through every opening. Bracelet Making Projects can help you compare a finished layout. Pen projects require the center opening, bead height, and rod diameter to work together; use Beadable Pen Projects, beadable pens, and pen toppers as the relevant project and product paths.

For keychains, bag charms, and hanging accessories, check total weight and hardware strength before combining several large components. The DIY Keychains & Keychain Supplies page provides the broader project path.

Use material pages for material-specific choices

Browse acrylic beads, glass beads, pearl beads, and spacer beads through their material collections, then compare the selected product's dimensions, opening, construction, pack quantity, and net weight. Appearance or a material category alone does not prove a product's exact specification or finished feel.

Some searches use the wording “beads sizes.” The useful comparison is the stated outside measurement plus the separate hole measurement. A bead measurement chart or bead sizing chart supports planning, but it does not replace the dimensions listed for the individual item.

Use a specialist guide for the next question

For material-specific sizing, use the Glass Bead Size Chart or Sugar Beads Size Guide. For 6/0, 8/0, 11/0, manufacturer, and shape differences, use the Seed Bead Size Chart & Aught Guide. When the task is estimating a strung length rather than choosing an outside size, use the Beads Per Inch Chart.

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What is a bead size guide used for?

A bead size guide helps you compare outside diameter, center opening, shape, weight, and project use. It is useful for planning bracelets, keychains, beadable pen designs, earrings, bag charms, and other handmade accessories before ordering.

What is the difference between bead size and bead hole size?

Bead size usually describes the outside diameter or another outer dimension. Hole size is the center opening used by elastic, nylon, wire, ribbon, or a rod. A larger outside bead can still have a small opening, so compare both measurements.

How big is an 8mm bead?

An 8mm bead has an outside measurement of about eight millimeters when that figure is the stated diameter. It is a medium scale for many bracelets, keychains, and small gifts, but shape and thickness can change how large it looks in the finished project.

How many 6mm or 8mm beads do I need for a bracelet?

The quantity depends on wrist size, spacers, charms, knot space, and the actual shape of each component. Use the Beads Per Inch Chart for a starting estimate, then check the real layout and finished length before cutting the cord or choosing a larger pack.

What size beads fit beadable pens?

Fit depends on the selected bead's center opening, bead height, orientation, and the actual rod diameter. Outside size alone does not prove fit. Start with Beadable Pen Projects, then verify the individual product description or a tested bead-and-pen combination before ordering or forcing a component onto the rod.

When should I choose large hole beads?

Use large hole beads when thicker cord, visible knots, several passes, stacked strands, or a rigid rod needs additional clearance. Terms such as big hole beads, wide hole beads, and beads with large holes are descriptive labels; the stated millimeter opening is more reliable.

Are seed-bead numbers the same as millimeters?

No. Seed-bead labels such as 6/0 and 8/0 are not the same system as bead sizes in mm. Manufacturer, shape, coating, and production method can affect the outside size and hole. Use the Seed Bead Size Chart & Aught Guide for manufacturer- and shape-specific comparisons, then check the selected product when choosing thread or a needle.

Can a bead size chart show actual size on a screen?

A bead size chart actual size display can change with browser zoom, screen density, and image scaling. Use written millimeter dimensions and compare them with a physical ruler or caliper. The U.S. quarter in the image chart is a familiar reference, not a precision measuring tool.

Are acrylic, glass, and pearl-style beads the same weight?

Not necessarily. Weight depends on material, construction, shape, thickness, coatings, hardware, and the chosen product or variant. Compare the selected product's listed details or measured net weight when finished weight matters; do not use a material category as a fixed weight value.

How do I choose beads by size, color, and shape?

Choose size for function and scale first. Then use Shop by Color for the palette and Shop by Shape for the visual form. Confirm the individual product dimensions, opening, material, and pack details before ordering.

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Acrylic Beads Glass Beads Pearl Beads Spacer Beads Beadable Pens Pen Toppers

Last reviewed: August 6, 2026. Exact dimensions, opening, pack quantity, net weight, availability, and compatibility are controlled by the selected product and variant details.