When buying either Swarovski or Preciosa hotfix crystals, you will always see the crystal size in terms of SS.

What is SS?

SS stands for Stone Size. By looking at SS, some people will have no ideas on the actual crystal size. You may convert SS to millimeter by using the table below so that you may have an idea on how big is the crystal.

The table below shows the conversion between SS to millimeter for the common size of Swarovski & Preciosa Hotfix Crystal.

Stone Size (SS) Size (mm)
SS 4 1.50 – 1.70
SS 5 1.70 – 1.90
SS 6 1.90 – 2.10
SS 7 2.10 – 2.30
SS 8 2.30 – 2.50
SS 9 2.50 – 2.70
SS 10 2.70 – 2.90
SS 12 3.00 – 3.20
SS 16 3.80 – 4.00
SS 20 4.60 – 4.80
SS 30 6.30 – 6.50
SS 34 7.00 – 7.30
SS 40 8.35 – 8.65
SS 48 10.95 – 11.25

By the way, the above table is also suitable for non-hotfix Swarovski and Preciosa crystal.

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