5 lbs. is still very small.
Although Abby was the runt of the litter, she is a bit bigger than my last one.
I did want one that was going to be the same size as my last one but as others here have said you can't really tell how big they are going to be.
Abby is bigger (by comparison but still very small ) but it doesn't change the way I feel about her.
I hope you have a healthy, happy baby.