I swim lengths about 3 times a week between 64 and 100+ lengths a session. I have been going though loads of cheep, shop brought legsuit costumes for the last 2 years and am now fed up buying 1 every month or so and decided to look for a better made, quality one. I placed my order on the 18/8 and had it delivered on the 21/8 very quick, I can't thank simply swim enough! I ordered a 42" it is a snug fit, holds everything in its place and I can easily swim freestyle, backstroke, breaststroke and tumble turns in it, the fabric seams robust and looks like it could last a lot longer than my usual 1 a month costumes. Took it on a 150 length swim at the weekend and was great! the legs did ride up a little but so did all the others I have had and I am use to it. I am now waiting for another speedo costume to come in stock in 42" and I shall be purchasing it! Thank you so much, simply swim, I now feel comfortable to order online and get good quality costumes!