| size(cm) | inner length(cm) | inner width(cm) | outer length(cm) | outer width(cm) | suggest weight (kg) |
| XS | 3.3 | 2.5 | 4.8 | 4 | 0-2kg |
| S | 3.6 | 3 | 5 | 4.4 | 2-3kg |
| M | 4 | 3.5 | 5.5 | 4.4 | 3-4kg |
| L | 4.5 | 4 | 6 | 4.8 | 4-6kg |
| XL | 5 | 4.3 | 6.6 | 5.4 | 6-8kg |
| NOTE: The Above dimensions are for manual measuring, allow 0.5-1cm error exists | |||||
