I use the Speedo Contoured Swim Paddles during my fitness swim 3 days per week. What is so great about it is that it really contours to the shape of my hand and allows me to develop more correct and powerful strokes. I cannot find anything that is not great about these swim paddles.

I love this paddles my arms are getting a great workout

Nice design with the contours for fingers.  Feels more natural and comfortable than the regular rectangular paddles.

We were able to use these for swimmers of all ages, from our 6 year olds up to me (39). Very adjustable and helped swimmers improve their strokes.

I purchased these after purchasing flat ones that I really didn't like. The contours of this set make paddling more efficient and fluid. (No pun intended) . People I swim with regularly use these as well.

I am a fairly large guy with large hands and the fit was just right out of the box.  There is an adjustable strap that should accomondate most hand sizes.  Its the first time I used paddles so it took a little getting used to.  The paddles created a little more stress of my left shoulder which has been bothering me.  I'll continue to use them though.