I would ask your boyfriend to speak to his parents and request that they intercede to get the bracelets back. $80 is a lot of money. If the problem is that the girls would be upset -they are young enough that this will not be a lasting scar on their psyches to have a bracelet they were 'given' taken away and replaced with something more age appropriate (and cheaper!). Heck even speak to the kids' parents directly, explain that you realize the girls like them, but they are not sized properly and are not appropriate for the age, offer to replace with suitable replacements, go from there. I would not take an $80 snub like that. Tell the parents that you want the bracelets back so you can replace them with the "Specific" ones and then simply return them and don't buy anything else for that girl. At 26 she should know better.