sashalennonpottery

Site URL: https://sashalennonpottery.com/ I sell physical goods, and I have upgraded my site to included carrier calculated shipping rates at checkout. Most of my goods require a box for shipping, but I recently started selling stickers. Stickers are flat, and don't need to be shipped in a box. I want the calculated shipping when shipping only stickers to be $0.55 (the cost of a stamp). I can't find a way to manipulate the carrier calculator to know to place the items in an envelope and not a box. I have tried creating a flat rate shipping option, but since I can't apply shipping options to individual products, the shipping option displays at checkout as an option for all orders. I have lost money when people ordering items requiring a box choose the sticker shipping option. I have also tried making a discount for free shipping for the stickers but, again, when people order multiple items it applies the discount to the entire order when I don't want the entire order to have free shipping. Please help!