Is there a weight limit on USPS flat rate boxes?

Related questions

1. Where can I drop off USPS packages?
2. What is the largest size box USPS will take?
3. Is it better to ship a large box or two smaller boxes?
4. Can I use any box for USPS Priority mail?
5. What is considered a large package for USPS?
6. How do USPS flat rate boxes work?
7. What is the current postage rate for 2019?
8. What is considered an oversized package by USPS?
9. Is it cheaper to ship UPS or USPS?
10. What size is USPS large flat rate box?

Tags

1. #large
2. #small
3. #restrictions
4. #packaging
5. #international
6. #pounds
7. #medium
8. #supplies
9. #priority
10. #boxes
11. #store
12. #envelopes
13. #order
14. #weight
15. #priced