My 5 week old is 10 lbs (born at 7lb 9 oz) and is wearing 3 month clothes already!
My baby was born 7.7lbs, at 5 weeks was 9.6lbs and same, wearing 3 month clothes! She's now 4 months, 14.5lbs and 25.1 inches, wearing 6 month and 6/9 month sizes!!! These babies grow WAY too fast!!!