KathyO@KathyO, you can still get both!
When you were in the checkout page, you would have had to hit "Add Another Selection" in order to add the other option.
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Since you've already Joined for the large size, go to your Transactions (https://www.massdrop.com/transactions) and click "Add Another Option" to add the smaller size.
HeatherVstill not an option, and looks like the order has already been placed so I'm out of luck. Initially I was trying to add another selection....and there is no add another option now. oh well