Size ChartNike Singlets Size Chart
| Size | Weight In Pounds | Weight In Kg |
| XXXXS | 40-60 lbs. | 18-27 kg. |
| XXXS | 60-70 lbs. | 27-32 kg. |
| XXS | 70-80 lbs. | 32-36 kg. |
| XS | 80-100 lbs. | 36-45 kg. |
| S | 100-125 lbs. | 45-57 kg. |
| M | 125-150 lbs. | 57-68 kg. |
| L | 150-185 lbs. | 68-84 kg. |
| XL | 185-220 lbs. | 84-100 kg. |
| XXL | 220-265 lbs. | 100-120 kg. |
| XXXL | 265-310 lbs. | 120-141 kg. |
