This fastskin suit for both boys & girls seems very popular among the 9-10 yrs old who swim at 'regular year -round swim meets' and regional championship like JO's.It seems to serve the purpose well for those young 'entry-level of championship' swimmers.*Sizing:as usual on 'Tec suit', always tricky until reaching the right size for kid (even same brand!). My boy (5" 70lbs, skinny with muscles) wears 24 (or sometimes 26), and he wears 24 for this Fastskin suit. We got 22 initiately, but there is no way to fit. Way to small.I got another one as a back up.After many hours of my research, I also got FINIS FUSE and Bluseventy neroFIT just to compare as those also have good reviews from the 'more experienced swimmers'.Similar price range, so why not.But FUSE is clearly required more care, and delicate. So it really makes a sense for me that this suit fits for 9-10, especially boys!My question is how long, how many times he can wear.He swam 4 X a half day meet so far.I can not tell the difference yet.Our boy qualified National Show Case in FL, and Eastern Zone Championship for this August in NY.Will see.(I see some 9-10 kids who wear speedo LZR, Arena's upscale Powerskin suits, but we don't want to get into those business for our 10 years old yet, also we don't want our 10 yrs to start to learn 'relying on' the suit beside focusing the FUNDAMENTAL TECHNIQUE, which is the MOST IMPORTANT things for those ages.So we think that this is reasonable for our family, and if he turns 13…