I checked Sadie's vet records and at 6 weeks she was 1 lb. At 10 weeks she was 2 lbs. Now she is and adult right at 4 lbs. The weight I expected.
You also have to factor in body type. Sadie is quit short and stocky while others of her same weight I have see tall and thin looking. So she actually looks smaller than she weights in.
Hope this helps.