At this point, there is a limit of 10 options that can be added for the dropdown box for a single upsell. In the case of T-shirt sizes, we have 16 T-shirt sizes spread between Youth, Women's, and Men's and are currently forced to spread that among 3 different Upsells. This then means that a participant could accidentally choose more than one T-shirt option and since there is no charge, could complete the registration process without correcting. When tracking inventory, Upsell is the only option for T-Shirts.