Piece Size Tool
Letter or flat, before it changes your postage.
Open Piece Size Tool
Free. No sign-in needed.
What it does
Upload a PDF and the Piece Size Tool tells you whether the finished piece mails as a USPS letter or a flat, with the dimensions that decide it.
Why it matters
A fraction of an inch moves a piece from letter to flat pricing. Catching that before print is the difference between a budget that holds and one that does not.
How to use it
- Upload the artwork PDF
- Confirm the detected trim size
- Read the category and any warnings
Free, and no sign-in is needed.
Not sure which rule applies?
Ask Plavidian Expert in plain English and get an answer grounded in the USPS Domestic Mail Manual, or read the standard behind it.
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