Average SiZe?

Hey coaches, im a head coach of a 5th/6th/7th grade team here in Lakewood, Ohio (a suburb of Cleveland)...its part of the local recreation dept...and is overseen by the lakewood high school football coach...where we get all our equipment from, for the most part...etc..etc...
what im wondering is, in reading thru the other posts in here, the sizes of your teams? we dont get many off lineman over 200lbs...maybe, anywhere from 140 average....no backs can weigh over 140...etc...i dont understand the difference with your pop warner leagues, etc...what is Pop Warner?...there seems to be youth football leagues everywhere....i played CYO (Catholic School version)....Alot of the posts i read here seem to have way advanced leagues, and teams, and formations, and plays....we re more of a city league...we re lucky we can get all the kids to practice at once, and then make sure they arent hanging on the corners smoking and drinking afterwards.....not all of them, of course, but you get my drift.....but im just curious what size your players are, and what size your squads are...ours, this year, was 26, and thats our biggest ever....same for all the teams....we all usually have only about 17 or 18 left by the end of the season...you get alot of drop outs too?