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Swarovski Flatback Sizes

Available in a variety of sizes and colors, Swarovski flatbacks are perfect for adding dazzling embellishments to scrapbooks, flip-flops, clothing, greeting cards, cell phones and more! Since rhinestones have a unique sizing description not based on millimeters, these images will help you understand how their sizing relates to the size of a penny. Also, when covering large surface areas with flatbacks it is important to have an idea of how many crystals are required to fill the area. For help with this please refer to our handy chart by clicking here.


Flatback Rhinestones
  • SS5 - Diameter: 1.7-1.9mm
  • SS7 - Diameter 2.1-2.3mm
  • SS9 - Diameter 2.5-2.7mm
  • SS12 - Diameter 3.0-3.2mm
  • SS16 - Diameter 3.8-4.0mm
  • SS20 - Diameter 4.6-4.8mm
  • SS30 - Diameter 6.3-6.5mm
  • SS34 - Diameter 7.1-7.3mm

Hotfix Rhinestones
  • SS6 - Diameter 1.9-2.1mm
  • SS8 - Diameter 2.3-2.5mm
  • SS10 - Diameter 2.7-2.9mm
  • SS12 - Diameter 3.0-3.2mm
  • SS16 - Diameter 3.8-4.0mm
  • SS20 - Diameter 4.6-4.8mm
  • SS30 - Diameter 6.3-6.5mm
  • SS34 - Diameter 7.1-7.3mm
  • SS48 - Diameter 10.9-11.3mm


Stone size Diameter in millimeters Approximate Number required per square inch
SS5 Diameter 1.7-1.9mm 199
SS6 Diameter 1.9-2.1mm 161
SS7 Diameter 2.1-2.3mm 133
SS8 Diameter 2.3-2.5mm 112
SS9 Diameter 2.5-2.7mm 95
SS10 Diameter 2.7-2.9mm 82
SS12 Diameter 3.0-3.2mm 67
SS16 Diameter 3.8-4.0mm 42
SS20 Diameter 4.6-4.8mm 29
SS30 Diameter 6.3-6.5mm 16
SS34 Diameter 7.1-7.3mm 13
SS48 Diameter 10.9-11.3mm 5



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