You will probably need to get a size larger that you are used to getting but the fins are great.

I was disappointed in the flippers.  They are longer than I anticipated and create a lot of drag on my feet.  I would have returned them but I had already used them in the water and was unable to.  The quality and fit is fine, they will work better for me to snorkel in.

They fit perfectly for kids with narrow feet!  However, one of my children has wide feet, and they were way too tight.

I bought the 11-13.  I am a 12 and they are very snug.  they have loosen up a bit.

These have worked well for me in triathlon training.  My shoe size is 9 1/2 and these seem to fit just right and snug on my feet, no sliding during swims.

I was pleasantly surprised that the fin was so comfortable to use right out the box and for a long work out. I was expecting some part of my foot to get blistered, but thankfully that did not happen.  I also was pleased with the sizing, considering how many reviews warned about it.  I wear a women's 8 and I ordered the 7 - 9.  The fit is just right.  I use the fins as part of my workout to get a really good leg work out in. The fins do the trick!