I've gone from my typical size 7M to 6.5M, although I can wear size 6W or 6.5W too.
Skechers sizes have changed in the last couple of years, not sure why. If you read reviews on tons of skechers here you'll find a LOT of complaints that they're too big and a LOT of returns because of the sizes.
If I were you I'd for sure size down at least half a size.
I still buy them, still LOVE them. Comfort beyond belief. I have quite a collection.