Size Conversions and Printable Size Chart
Rhinestone SS SizeMillimeters
SS5
1.5
SS7
2
SS9
2.5
SS12
3
SS16
4
SS20
4.5mm to 4.8mm
SS21
5
SS30
6.0mm to 6.5mm
SS34
7
SS40
8
SS42
9
SS48
11




US Nailhead # SizeMillimeters
#12
3.5
#16
4.5
#20
5
#30
6
#40
9
#60
12
#70
13
#80
15
#100
22
mmDecimalFraction
10.0393/64
1.50.0591/16
20.0795/64
2.50.0997/64
30.1181/8
3.50.1389/64
40.1585/32
4.50.17711/64
50.19713/64
5.50.2177/32
60.23615/64
6.50.2561/4
70.2769/32
7.50.29619/64
80.3155/16
8.50.33511/32
90.35523/64
9.50.3743/8
100.39425/64
110.4337/16
120.47315/32
130.5121/2
150.59119/32
180.70945/64
200.78825/32
220.8677/8
250.9851
301.1821-3/16
321.2611-1/4
351.3791-3/8
401.5761-1/2
451.7731-3/4
501.9702
602.3642-3/8
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Common object comparisons
Pencil Eraser Tip
Diameter = 6.5mm

#30 Flat Copper
Diameter = 6mm
US 10 cent coin
Diameter = 18mm

#80 Dome DNA
Diameter = 17mm
US 5 cent coin
Diameter = 21mm

#90 Dome Gold
Diameter = 20mm
US 25 cent coin
Diameter = 24mm

#100 Star Gold
Diameter = 22mm