The original artwork for most Ozy and Millie strips is roughly 17 inches wide by 6.5 inches tall (43 x 16.5 cm). Sundays and some other strips are larger, and a few are smaller. If you need to know the specific size of a particular strip before ordering it, it's best to ask ahead of time.
Sunday strips were drawn in black and white and then colored digitally, so the originals are the black-and-white line art.
The artwork is done with india ink on acid-free bristol, but they were drawn mainly for one-time use, to be scanned into digital form; some may have corrections done with materials that are not archival-quality, such as white-out, paste, or stick-on labels. Where this is the case I note it in the description.
If there's a strip you'd like to purchase, visit it in in the archives first to make sure it's still available. If so, you can email omoriginals@danasimpson.com to request it.
Originals are US$100. Shipping is free inside the US; for international orders, shipping costs will be calculated when you make your request.