It's a Shopify site, so I'm just using their integration to print labels from whoever's cheapest - so far it's always been USPS. Honestly the shipping is something I need to figure out... I'm charging flat shipping per product right now until $50 because I don't want shipping costs to be too discouraging, but I am losing money shipping to the East Coast.

For the most part my margins are pretty decent and at this point I'm more interested in proving that there's product-market fit than optimizing for profit, so I don't mind losing some money when my shipping charges don't cover it or people hit the free shipping threshold. Definitely something I'm going to need to get a better handle on long term, though.