Wetsuits should feel snug on and you will probably feel that range of motion is slightly reduced, this is normal. However, make sure breathing doesn't feel restricted.
Wetsuit fit should not be too loose. This would let water flow freely through the suit and would therefore lose all the benefits of the trapped water being warmed by your body.
For a correct wetsuit fit, wrists, ankles and neck should be snug.
The fit should not be too baggy in the underarm or leg area. Some bagginess at the small of the back is normal.
