large wearable range with high spandex content
1.  size M is suitable for wear range of S-M size;
2.  size XL is suitable for wear range of L-XL size;
3.  size 3XL is suitable for wear range of 2XL-3XL size;
4.  size 5XL is suitable for wear range of 4XL-5XL size;
5.  size 7XL is suitable for wear range of 6XL-7XL size;