My team ages up to U13 on September 1 (2021s). 4-5 of my midfielders weigh 75-80 lbs, which is around 25% for an 11 1/2 years old per the above chart. Compare to a kid who is 12 1/2 years old and in the 75-90% range (not unusual for a travel team) and weighs 110-130 lbs.

Not complaining my team is small - that's who made the team - but one can see how much safer it will be for my kids to play other kids their age. Playing in 2021 divisions should provide that, barring a bunch of hold-backs and I've only heard of one 2021 team accused of that. But, at least in my case, I will seek tournaments that have a 2021/U12 division and avoid those tournaments who don't enforce their own age rules.

PS - Last Fall was a mess with the new U.S. Lacrosse age rules going into effect and some smaller tournaments seemingly being clueless. Saw a 4th grade team play a 6th grade team in one championship. Hopefully, that won't reoccur this year.