NEED Advice: Jammers swimwear fitting

Hi. I am a parent of 9 y.o. boy, with great swimming potential. :) For the past 3 years I've been buying jammers just based on the fit (and kept buying a size larger every year). Now, I've decided to actually check recommended sizing. He is very tall - 4'10". His waist is about 26 and every site states that for this waist size should be 26. I am so confused as my son is wearing size 30 and I am thinking to already buy size 32 (next season). I am looking for recommendation from coaches and professional swimmers! Maybe I am wrong with sizing and that potentially can be not so good for his timing. I am also planning to buy an expensive suit for his swim meets (Blueseventy NERO TX Men's Jammer) and I don't want to make a mistake in sizing. Please share your opinion! Thanks!! :) I honestly don't remember or know what my suit sizes were when I was younger. I had a good mom like you to take care of that. I'm confident there are some parents here that can be of better help. This may be a stupid question but are these adult or children size suits? You said you were buying him a men's tech suit. I'm a foot taller and 12 years older and wear a size 30-32. Jammers should not be baggy. I do see a lot of young kids at the pool wearing really baggy jammers. That really defeats the purpose because that creates drag. The jammer should be tight, form fitting, but not constricting. You don't want to inhibit flexability or long term comfort. I find the material varies depending on the fit. I will premise this by saying I only will buy speedo suits. I am 5'11 size 32 waist. If i buy a practice suit, I buy the endurance material which is polyester so it's not that stretchy. In lycra suits that I use in races, I usually wear a 30 or 28. They stretch more. Generally speaking people buy smaller tech suits because they think it will make them faster. I personally think some brands, like speedo, make their suits larger knowing people will do this. Tech suits are very delicate and rip very easily, so you have to be very careful with them. If you buy too small, you risk ripping it putting it on. Also know that tech suits only last a couple meets before they wear out. You usually get between 1-2 meets with a tech suit, and if you're lucky 3 or 4.

Hi. I am a parent of 9 y.o. boy, with great swimming potential. :) For the past 3 years I've been buying jammers just based on the fit (and kept buying a size larger every year). Now, I've decided to actually check recommended sizing. He is very tall - 4'10". His waist is about 26 and every site states that for this waist size should be 26. I am so confused as my son is wearing size 30 and I am thinking to already buy size 32 (next season). I am looking for recommendation from coaches and professional swimmers! Maybe I am wrong with sizing and that potentially can be not so good for his timing. I am also planning to buy an expensive suit for his swim meets (Blueseventy NERO TX Men's Jammer) and I don't want to make a mistake in sizing. Please share your opinion! Thanks!! :) I honestly don't remember or know what my suit sizes were when I was younger. I had a good mom like you to take care of that. I'm confident there are some parents here that can be of better help. This may be a stupid question but are these adult or children size suits? You said you were buying him a men's tech suit. I'm a foot taller and 12 years older and wear a size 30-32. Jammers should not be baggy. I do see a lot of young kids at the pool wearing really baggy jammers. That really defeats the purpose because that creates drag. The jammer should be tight, form fitting, but not constricting. You don't want to inhibit flexability or long term comfort. I find the material varies depending on the fit. I will premise this by saying I only will buy speedo suits. I am 5'11 size 32 waist. If i buy a practice suit, I buy the endurance material which is polyester so it's not that stretchy. In lycra suits that I use in races, I usually wear a 30 or 28. They stretch more. Generally speaking people buy smaller tech suits because they think it will make them faster. I personally think some brands, like speedo, make their suits larger knowing people will do this. Tech suits are very delicate and rip very easily, so you have to be very careful with them. If you buy too small, you risk ripping it putting it on. Also know that tech suits only last a couple meets before they wear out. You usually get between 1-2 meets with a tech suit, and if you're lucky 3 or 4.