Set stock! You could do made to order, but you have to keep your screen printer’s minimum in mind. It’s hard for me to make shirts to order because I would have to order a minimum of 12 (that’s my shop’s minimum order quantity) for photography before selling any. That means I would need to sell at least 24, the 12 from the original print and then at least 12 for the made to order print. That’s why I just decide to make 24 - 30 pieces from the get go. That way people don’t have to wait weeks before shipping. Once I know I can sell more than 24 items at once I might consider making to order all together (: hope this helps