Bead Size Chart: 4mm–20mm Beads for Bracelets, Keychains & Crafts

Choosing the right bead size can make your bracelet, keychain, beadable pen, lanyard, or jewelry project look cleaner and feel easier to use. Smaller beads create delicate jewelry and detailed designs, medium beads are great for everyday bracelets, and larger beads work well for chunky accessories, keychains, pens, and beginner-friendly crafts.

This bead size chart compares common bead sizes from 4mm beads to 20mm beads. Your 4mm, 5mm, 6mm, 8mm, 10mm, and 12mm bead collections may include multiple materials such as acrylic, glass, gemstone, heishi, letter, spacer, and silicone beads when available. Larger sizes like 14mm–20mm may focus more on acrylic beads and chunky craft projects. You can also browse our shop beads by size page to view size collections together.

Why Bead Size Matters

Bead size affects the style, weight, comfort, and use of a finished project. A bracelet made with 4mm or 5mm beads will look smaller and more delicate, while a bracelet made with 10mm or 12mm beads will look fuller and more colorful. Larger beads, such as 16mm, 18mm, and 20mm beads, are easier to handle and work well for keychains, beadable pens, lanyards, bag charms, and bold DIY designs.

Size also affects how easily a bead works with cord, elastic, and other supplies. Smaller beads usually need thinner cord, while larger beads often work with thicker stringing materials. Always check the hole size listed on the product page before starting your project.

Quick Bead Size Chart

Small Beads: 4mm, 5mm, and 6mm

4mm beads are best for delicate jewelry, small bracelet details, spacer-style designs, and lightweight projects. They are a good choice when you want color without making the bracelet feel bulky. These smaller beads can also be used between larger beads to add detail and balance.

5mm beads are a helpful in-between size. They are slightly larger than 4mm beads but still small enough for delicate bracelets, subtle accents, and detailed craft projects. If 6mm beads feel too large for your design, 5mm beads may give you the smaller look you want.

6mm beads are one of the most useful sizes for bracelets. They are small enough to feel comfortable but large enough to show color clearly. Use 6mm beads for friendship bracelets, name bracelets, simple stretch bracelets, kids’ crafts, and everyday handmade jewelry.

Small beads also work well with letter beads when you want a more delicate name bracelet or word bracelet. If your design needs separation between letters or sections, you can add spacer beads for a cleaner finish.

Medium Beads: 8mm, 10mm, and 12mm

8mm beads are a popular size for standard bracelets because they are easy to string and comfortable to wear. They work well for friendship bracelets, kids’ bracelets, name bracelets, and handmade gifts. This size is large enough to show color and finish without feeling too chunky.

10mm beads create a fuller bracelet look. They are a good choice when you want the color, finish, or shape of the bead to stand out more. Use 10mm beads for colorful bracelets, simple keychains, party favors, and beginner craft projects.

12mm beads are great for chunky bracelets, beadable pens, keychains, bag charms, and lanyards. They are easier to handle than smaller beads, which makes them a good option for kids’ crafts, classroom activities, and party projects.

Medium sizes are especially useful for acrylic beads because acrylic is lightweight, colorful, and available in many shapes and finishes.

Large Beads: 14mm, 16mm, 18mm, and 20mm

14mm beads work well when you want a bold bead without going too oversized. They can be used for statement bracelets, keychains, and accessories that need more visual impact.

16mm beads are better for chunky bracelets, bag charms, lanyards, and statement craft projects. Their larger size makes them easy to handle and helpful when you want a project to fill space quickly.

18mm beads are a good choice for bigger accessories, beginner-friendly crafts, and bold handmade designs. They work well when you want the bead itself to be a major part of the finished look.

20mm beads are the largest size in this guide. They are best for oversized keychains, lanyards, bag charms, beadable craft projects, and bold statement designs. Because they are easy to see and easy to handle, they are also useful for beginner-friendly projects.

Glass Seed Beads for Tiny Details

Glass seed beads are different from larger acrylic beads because they are much smaller and often used for detailed jewelry work. They are a good choice for bead weaving, delicate bracelets, small spacer details, color patterns, and lightweight handmade jewelry.

If you want tiny beads for fine designs, glass seed beads are usually a better fit than larger acrylic beads. If you want bold bracelets, kids’ crafts, keychains, beadable pens, or lanyards, larger bead sizes will usually be easier to use.

How to Choose Bead Size by Project

For delicate bracelets, choose 4mm, 5mm, or 6mm beads. These sizes work well for lightweight jewelry, bracelet stacks, and smaller designs.

For everyday bracelets, choose 6mm, 8mm, or 10mm beads. These sizes are comfortable, easy to string, and useful for friendship bracelets, name bracelets, and handmade gifts.

For chunky bracelets, keychains, beadable pens, lanyards, and bag charms, choose 12mm, 14mm, 16mm, 18mm, or 20mm beads. Larger beads are easier to handle and create a bolder finished design.

For name bracelets, make sure your accent beads match the size of your letter beads. Smaller letter beads pair well with 4mm, 5mm, and 6mm accent beads, while larger letter beads can be mixed with 8mm, 10mm, or 12mm beads.

Bead Size Ideas by Project Type

Friendship Bracelets

Use 6mm or 8mm beads for a comfortable everyday bracelet. Add letter beads for initials, names, or short words.

Name Bracelets

Use 6mm, 8mm, or 10mm beads with letter beads. Add spacer beads around the name if you want the word to stand out more clearly.

Keychains

Use 12mm, 14mm, 16mm, 18mm, or 20mm beads for bold keychains. Larger beads are easier to see and work well with simple designs.

Beadable Pens

Use larger beads such as 12mm and above, depending on the pen rod and bead hole size. Always check fit before starting.

Lanyards and Bag Charms

Use 14mm, 16mm, 18mm, or 20mm beads for lanyards and bag charms. Larger beads help the finished accessory stand out.

Jewelry Making

Use 4mm, 5mm, 6mm, or glass seed beads for smaller jewelry details. These sizes are better for delicate bracelets, necklaces, earrings, and detailed patterns.

Frequently Asked Questions

What bead size is best for bracelets?

6mm, 8mm, and 10mm beads are the most popular sizes for bracelets. Smaller 4mm and 5mm beads create a delicate look, while 12mm and larger beads create chunkier bracelet designs.

What size beads are best for name bracelets?

6mm, 8mm, and 10mm beads work well for name bracelets, depending on the size of the letter beads you are using. Smaller accent beads create a dainty look, while larger beads make the bracelet more bold and colorful.

What bead size is best for keychains?

12mm, 14mm, 16mm, 18mm, and 20mm beads work well for keychains because they are larger, easier to handle, and more visible.

Are smaller beads harder to use?

Smaller beads can be harder to handle, especially for kids or beginners, but they are great for delicate jewelry and detailed designs. Larger beads are easier to string and work better for beginner crafts, keychains, and lanyards.

Can I mix different bead sizes in one project?

Yes. Mixing bead sizes can make a design more interesting. Use larger beads as the main focus and smaller beads as accents or spacers. This works well for bracelets, keychains, beadable pens, and jewelry making.

Start Shopping Beads by Size

Use this bead size chart as a guide, then choose the size that best fits your project. Whether you are making delicate bracelets, name bracelets, keychains, beadable pens, lanyards, bag charms, or bold craft projects, the right bead size helps your finished design look cleaner and easier to use.