If you are trying to do it yourself with online framing, Visit American Frame's realy cool Frame Shop by selecting a frame on their site.

You can then insert this image by clicking "Choose Artwork" and then the "user your own artwork link". On the following page, paste the following url in the "Artwork already on the Internet" field and press the "Get Image..." button.

1st edition is listed as 18.000" x 24.000"
MEASURE YOUR PRINT BEFORE ORDERING

We do not recommend using the measurements on this site for ordering your frames as they may not be correct. Also, you may want to order based on image size and not print size.