Size Charts for Beads and Sequins
Inches to Millimeters
Inches (in.) Millimeters(mm)
1/16 in. 1.5mm
1/8 in. 3mm
1/4 in. 6mm
3/8 in. 9mm
1/2 in. 12mm
5/8 in. 15mm
3/4 in 18.5mm
7/8 in. 22mm
1 in. 25mm
Remember that this is a close approximation. Screen resolution and monitor size will affect how you view the chart.
Seed Beads Seed beads are measured in aughts, which are different than millimeters. The larger the number, the smaller the bead (15/0 is small, 6/0 is large).
Aught Size MM Size Beads per Inch
6/0 3.3 10
8/0 2.5 13
9/0 2.2 15
10/0 2.0 16
11/0 1.8 20
13/0 1.5 27
14/0 1.4 24
15/0 1.3 25
Delica 1.8 20
Birthstone Chart
Wire Size Chart
Gauge Millimeter
12 2.06
14 1.60
16 1.30
18 1.0
20 0.82
22 0.64
24 0.50
26 0.40
28 0.30
Wire Attributes
Wire Gauges - In reference to wire gauge sizes, the larger the number, the smaller the diameter of the wire.
26g - extra fine - for very small and delicate projects
24g - fine - for pearls & most gemstones - easy to work with
22g - medium - fairly universal for glass beads, fits some pearls and gemstones
20g - medium heavy - great for earwires, clasps or larger beads
18g - heavy - often good for chainmaille or when you want a heavier look
16g - heavy - often used as a base to wrap finer wires around
14g - heavy - often used as a base to wrap finer wire around
12g - very heavy - hard to work with, good for rings and buckles
The most commonly used sizes for wire wrapping are 20 to 24g.
Hot-Fix Crystal Instructions
(Chart is in seconds)
Recommendations: Pressure: medium; Ironing aids: Teflon
Please note that the temperature/time combinations shown in the above table are guidelines only. Always carry out tests before starting on the actual piece in order to find the best settings for your design.
How To Care: Here are some basic guidelines to follow when caring for Hot-Fix rhinestones attached to fabric.
Before Washing - Turn the garment inside out. Be sure to use a gentle wash cycle and a mild washing powder or liquid. To make sure that the crystals are not harmed during the wash, protect them with a soft, washing bag.
Before Drying - Turn the garment inside out. Use a low temperature and a gentle drying cycle. To make sure that the crystals are not harmed during the drying cycle, protect them with a soft washing bag.
When Pressing - Set the warmed iron to "Wool/Silk/Polyester/Viscose" Protect the clothing with a piece of cloth as a buffer between the fabric and the iron. Be careful when ironing, because if the iron is on for too long it can reheat the glue on the Hotfix crystals.
Dry Cleaning - garments with Hotfix crystals are safe for dry-cleaning.
Do Not Use Chlorine Bleach
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Easily convert millimeters to "Stone Size" or "Pearl Plate" measurements that are used for rhinestones and point back chatons, respectively. S.S./M.M/P.P. Conversion Chart