Custom Sticker Size?

No matter how small I make my design, the stickers always end up as maximizing the 4" size. I’m looking to make some 1"-2" sized stickers that are typical for the back of laptops.

Is there a way to change the size of a sticker for a design the same way we can resize the design on a shirt or a mug?

No this isn’t possible. This is due to the way the design is automatically rendered and the cut-out of your design is calculated. This is also why you can’t adapt the design in the same way as for other products.