Rhinestone SS Size | Millimeters | 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 # Size | Millimeters | #12 | 3.5 | #16 | 4.5 | #20 | 5 | #30 | 6 | #40 | 9 | #60 | 12 | #70 | 13 | #80 | 15 | #100 | 22 |
| | mm | Decimal | Fraction | 1 | 0.039 | 3/64 | 1.5 | 0.059 | 1/16 | 2 | 0.079 | 5/64 | 2.5 | 0.099 | 7/64 | 3 | 0.118 | 1/8 | 3.5 | 0.138 | 9/64 | 4 | 0.158 | 5/32 | 4.5 | 0.177 | 11/64 | 5 | 0.197 | 13/64 | 5.5 | 0.217 | 7/32 | 6 | 0.236 | 15/64 | 6.5 | 0.256 | 1/4 | 7 | 0.276 | 9/32 | 7.5 | 0.296 | 19/64 | 8 | 0.315 | 5/16 | 8.5 | 0.335 | 11/32 | 9 | 0.355 | 23/64 | 9.5 | 0.374 | 3/8 | 10 | 0.394 | 25/64 | 11 | 0.433 | 7/16 | 12 | 0.473 | 15/32 | 13 | 0.512 | 1/2 | 15 | 0.591 | 19/32 | 18 | 0.709 | 45/64 | 20 | 0.788 | 25/32 | 22 | 0.867 | 7/8 | 25 | 0.985 | 1 | 30 | 1.182 | 1-3/16 | 32 | 1.261 | 1-1/4 | 35 | 1.379 | 1-3/8 | 40 | 1.576 | 1-1/2 | 45 | 1.773 | 1-3/4 | 50 | 1.970 | 2 | 60 | 2.364 | 2-3/8 |
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