How long is a regular skimboard?

I want a straight up answer. Don't tell me to go to a surf shop. How can I tell if my skimboard is warped?

• I have a two year old fiberglass local motion skimboard, and the last time I rode it it seemed considerably slower than the previous times I rode it. It does have kind of a lot of dings, but I don't think any are fatal. The biggest one is like and inch and a half wide. I have ridden the skimboard with the ding, but I'm just not sure. If it is warped, is there any way I can fix it? thanx!

• Answer:

  No fixing a warped board, but I would definitely fix the dings on the bottom and try and make it as smooth as possible. To tell if it is in fact warped. you can get straight stick lay it across and look for weird gaps. or look at the board at eye level down the center and look for any twist, it actually should be pretty easy to look for warp, but the dings will slow you down more than the warp.