I have a question about FBA fee. I sent my products 2 weeks ago and Amazon measured my products. Because of packaging, Fba fee was higher than I expected. (Product lenght: 16", with packaging 18,3")
so next time, i decided to send it with smaller packaging. Do i need new UPC for the same product but smaller packaged? or will Amazon re-measure my products and lower automatically Fba fee from $8.26 to $4.90?
You should create a new seller SKU for the same ASIN. This will keep your new packaging from mixing with the old. You can force the old to sell out first.