1 = 9” - 11”
2 = 10” - 12”
3 = 12” - 14” 

Measurements are based on the largest part of your upper arm.

Use a tape measure to find which size range would suit you best.

Technical Sketch Showing How To Measure Your Arm for UV Protective Sleeves by Florescnt

All sizes are the same length from finger tips to upper arm.

Protection is the goal. If you are above the last measurement in a range please size up. The sizes are built around ultimate stretch in the fabric before it no longer offers 100% of the UV protection being offered.