FINISAdult Z2 Zoomers Gold

I have the Blue Zoomers circa 2004. They are size G -- so question 1) Are these sized the same? And question 2) Are they good for learning butterfly?

Will the size "H" fit a men's shoe size 12 or 13? Want to be sure before ordering.

What size am i? 8 1/2 w shoe but that is d or e. according to the measurements in cm im f. the blue was 6 1/2-8? where can i try them on?

does they come with a travel bag?