A lotta people don't know that there are TWO sizes of large flat rate boxes available at the USPS. : r/Ebay
USPS Discontinues Priority Mail Flat Rate Large Board Game Box
Priority Mail « Clutch-Me.Com
Retailers: Here Are the Most Popular USPS Priority Mail Sizes for Holiday Shipping | most valuable network
Can I ship a box like this? Technically a medium flat rate box and 1.5 priority shoe boxes taped together, but just under 5 pounds. They are knee high platform boots that
Priority Mail boxes and envelopes are shrinking
Priority Mail Medium Flat Rate Boxes, 25/pack – Endicia Supplies Store