Lesson learned. 06:02 PM. Ina Steiner is co-founder and Editor of EcommerceBytes and has been reporting on ecommerce since 1999. Next time, I'll use USPS Media Mail or Priority mail, or do my best to keep it under 1lb. Dont rate the seller, contact mercari first and wait until they refund you your $. I know that rating completes the sale but I wasnt sure how that worked with overdue postage. Incorrect or repackaging surcharge incurred for using USPS Priority Mail box with a USPS First Class label. Be sure to use the right box for your label. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. if (!document.MAX_used) document.MAX_used = ','; For more information, please review additional details on the USPS website. /us/help_center/article/172/?id=172&path=Why%20was%20I%20charged%20for%20overdue%20postage%3F&source=%2Fcontact Will try to do that next time :).Pirate Ship - https://www.pirateship.com/Paypal Ship - paypal.com/shipnowAs an Amazon Associate I earn from qualifying purchases. The package weight must be less than or equal to the weight specified on the label (H x W x L / 139 shipping divisor) and must be under 50 lbs. Depends on the post office. Thank you! This app sets itself apart by restricting in-person meetups and requiring that sellers ship the merchandise to buyers. Your package cannot be larger than 12 x 8 x 4 and the shipping weight cant exceed 5 lb. '&charset='+document.charset : (document.characterSet ? Its super petty and childish. Yes, just contact mercari, maybe he does that often and thats not right. Sellers are responsible for all fees associated with oversized packages or packages with incorrect dimensions which will be deducted from the sellers earnings. //]]>-->,