This is a question that I am not putting in Q & A 'cause I don't think it is a parenting Q

Anyway one of the mothers from my mother's group has a friend who sews baby stuff eg, sleeping bags and wraps etc...  anyway I got some sleeping bags made up for my son and got them delivered today.

The problem is that they are the wrong size.  When I rang her up I said I would like them for my son who is 5 mths old size 0 - 1 she said no problem.  When I looked at them today and paid for them I thought they were ok but they are not the right size.  I measured them up agained a size 00 that I have and it is about that size or smaller

What to do?  Do I ring her or email her and tell her.  I really hate doing things like this 'I get to embarrased/shy and don't want to hurt the other person.   I could sell them on ebay and get some more elsewhere LOL but I guess that wouldn't be right.  I know in my head that I have to let her know maybe she could sell these ones to someone else that puts an order through.

Oh, I just don't like have to tell her I get nervous etc...  but it has gotta be done right?