Don't worry!!!
He won't get past 12 lbs...I mean, I never heard of a Yorkie that did...plus, he could just be a fast grower. My baby Malibu was 3 lbs at 10 weeks and now she is 14 weeks and she is still 3lbs...he might stop growing quicker than other Yorkies. My breeder said my malibu should be around 4 or 5 lbs. Maybe yours will actually be around 6 or 7 lbs. Oh, and Juicy carriers can carry up to 16 lbs if they are the large size!