var m3_u = (location.protocol=='https:'? The label was for 15.9 oz but the package was actually 1lb 12oz. It is not the fault of USPS that there was insufficient postage so that would still have to be paid by either you or the seller. Mercari then determines how these increases will impact our rates for shipping labels for our users, Williams said. For heavy shipments using a Mercari prepaid label, make sure that your package is under 50 lbs in both actual weight and dim weight. How To Make More Money Selling Books On Mercari & Ship Via Media Mail | Easy Hack 7,770 views Jun 12, 2020 Today I'm going to show you how to list, pack and ship books that you sold on Mercari. The package size must be less than 45" (longest side) x 20" (second longest side). "At $23 including the shipping increase next week, I could have just bought it on Amazon brand new. Does USPS penalize my account the next time I use their service for sending/receiving mail if I ignore? ', Press J to jump to the feed. ,