What are standard poster frame sizes

When at Michael’s craft store you’ll notice many different picture poster frame sizes from small 4x6 frame to big size 36x48, you ask yourself , “ what are standard poster frame sizes ? “

here is a short list of poster frame sizes that are standard! 

12x18 poster frame 

13x19 poster frame 

16x20 poster frame 

18x24 poster frame 

20x30 poster frame 

24x30 poster frame 

24x36 poster frame 

27x40 poster frame 

30x40 poster frame

36x48 poster frame 

40x40 poster frame 

Frames