We use the same needles for kids as we do for adults for flu shots, so I’m sure this will be the same. The recommendation used to be a 5/8 inch needle for under 130lbs rather than a 1 inch, but in recent years we’ve used 1 inch for all. The 25g 1 inch we use for flu is the same we’ve been using for covid, so we are ready! And I can’t speak for the entire country obviously, but in upstate NY, supply is plentiful.sufficient supplies (such as pediatric-sized needles) to support adolescent Pfizer administration.