48.5 pounds and just turned 4; in 99% for height/weight since birth. My brother is 6'5"...

25 pounds is about when they start feeling heavy to carry. Get a ring sling to throw on and help support him on your hip. We used it a TON for that exact reason at that age. And encourage independence and walking on his own as soon as he's able. If he turns into a big toddler, you simply won't be able to carry him around like other parents of 2-4 year olds can. Mine could walk a mile at age 2 and it didn't help her slim down any, but it kept us from having to carry her when other kids were getting tired and whining to be picked up.

Mine was also huge like that and off the charts at either his 4 mos or 6 mos appointment or both. He started RUNNING at around 9 or 10 months (didn't actually walk until much later), and that thinned him out some, although I'm not sure that was any easier on me. Do you have a good baby carrier? I really liked the Ergo for him. I could never just carry him around on my hip. I had friends with petite little babies and I would pick them up and it felt like picking up a doll -- they were so light and easy! Be sure not to throw your back out carrying him.

By preschool he was basically normal size, if maybe on the stocky/muscular side -- I remember Carter's pants were always too skinny for him. Hanna Anderson worked a lot better.

He's 12 now and is 5'4", 125 (same as me before my COVID weight!), which seems to be about in the middle of the pack for his age, but he's definitely got an athletic build (not a skinny one). He has always eaten a lot, especially protein. As a baby, he nursed constantly, was an enthusiastic adopter of solids, etc. At least now he just goes to the fridge and gets himself a bowl of cottage cheese, or gets a bowl of cereal of whatever, but he still eats every couple of hours unless he's at school. I feel like the next couple of years are going to be rough on my grocery bill.

I ended up with a torn ligament in my wrist. Doc said it’s called mommy wrist. Practice good posture and try not to bend your wrists when picking up. As soon as he started walking i had to stop carrying him 99% of the time.