Custom Field Per Ticket

Hi,

I’m using My Tickets to do an online 5K sign up for a charity non-profit I help manage. We are giving them a shirt as part of their purchase and want to get their shirt size when they register. I’ve successfully added a custom field to the add to cart page, but it’s not quite what I want. I’m wondering if this has already been done or if I should try to build something on my own to accomodate this: I want the purchaser to have to select the shirt size for each ticket purchased, not each cart. Since the purchaser might be buying 3 registrations, each person might need a different shirt size.

Please let me know if this is easily do-able.

Thanks!

Jon