Most of the posters we sell are "Original US One-Sheet Posters" anything else is clearly stated in the description (reprint, daybill, half-sheet or insert).  

One-sheet posters are 27x41" for most movies made prior to 1990 and 27x40" for most movies made after 1990.  The transition was from 1989-1993 from 27x41" to the 27x40" of today.

The Posters we sell can fit into the following four categories:

Near Mint to Mint - A poster in about the best condition you can find it. Not displayed, only the most minimal of wear, no fading, rips, tape etc.
Very Good - Basically a NM poster that may have something preventing it from being NM like an extra fold, perhaps a single pin hole in the corners, a bit of storage wear or scuffing, pencil marks in the border, etc. This is what we notice most other people call “NM to Mint” condition.
Good - Pretty much an average everyday poster from the collection of any average collector. May have been displayed, theatre used, tacked to somebody’s wall etc. Can have prominent fold lines, small border rips or tears, some writing on the poster (front or back), a crinkle, slight fade or anything that may keep it from being considered better than just “good”. Still desirable and worth adding to your collection - especially if it’s a rare or hard to find poster to begin with. We will also use a good+ or good - rating.
Fair or Poor - Just that, a “Fair” or “Poor” condition poster. If it’s listed in our catalog as fair or poor, it will say why in the description. We don’t generally bother with any thing considered fair or poor, but you never know what kind of really rare stuff may pop up, and you can repair even the most damaged poster, so hey, maybe from time to time, a fair or poor poster may show up in our listings.