Well, I have a nice little scale that came from Costco. It will weigh up to 11 lbs. This is a photo of it sitting on an 8-1/2 x 11 sheet of paper to give you an idea of its size. Amazon has this same scale in black for about $20 (the SS one is rather more). Not postal scale accuracy, but it will get you close.
https://www.amazon.com/dp/B00AQMGFCY/
My only complaint with the one I got was that the battery that came with it was bad right out of the box. (Took me a while to figure out that it was a defective battery and not a defective scale, duh!) But it's just a plain old 9V battery, easy to replace.
