Size Chart - Standard US Sizes. Height Weight Gi Size 5'.2" - 5'.6" 110 lbs. - 135 lbs. A1 5'.7" - 5'.9" 140 lbs. - 165 lbs. A2 5'.10" - 6'.0" 167 lbs. - 200 lbs. A3 6'.1" - 6'.3" 205 lbs. - 245 lbs. A4 * These sizes are according to US standards and should only be seen as guidelines. For Guerrilla Gi's we would recommend that you match your size to the US standard and purchase one size up. For example, on the size chart if you find yourself an A2, you would fit well into a Guerrilla A3. If you are in between sizes, the fit is up to you as one size down would be snug. First wash can be dried to allow some shrinkage. However, we recommend hang drying your gi's. Should you have additional questions, please feel free to contact us.