In anything, you get what you pay for. But being a kid still, you will out grow them weell, before you wear them out. I would buy like a Cabela's or Red Head (Bass Pro Shop) brand. They will be just a little cheaper, but still a good wader. But will still be $159-$179.
Get something with 1000+gr of thinslate in the boot. 3-3.5mm Neo is usually easy to get around in. If you keep you feet warm, then the legs are rarely a problem.
Then you haft to deside if you are going to gets Size 10's hoping to make 2-3 years out of them. Size 9's is what will fit and stay on your feet in mud conditions, but you will probably only get 1 year out of them, if you are lucky, maybe 2 before you out grow them. Size 10's would be a little loser, and in muddy conditions, wouldstruggle to keep them from getting pulled off your feet, but could probably get 2-3 years if you were lucky.
At your age it is a hard time to buy equipment. If you buy good stuff, you feel that you are wasting moeny only being able to use it a year or two. Buy cheaper stuff and haft to struggle with the freezing you butt off. Each guys has to decide which way it will be, and which way he had rather have it.
But when you become a adult, buy good stuff and take care of it the best you can. It will last until you wear it out or tear it up, whioch is usually 4-6 years on waders. Your size sound normal, so I would just buy Size 9 or 10 Regular o the wader. Seems like the inseam is 30-31 inches. Even if it was a inch or two to long, it will not hunt ya. Just remember you are not trying to make a fashion statement, just keeping warm. cooter
member of: Team GREEN