It would be an ACEO print since it's a reproduction of your original work. You can make it a limited edition (often abbreviated LE) which means you will only print "x" number of them. Or an open editon (OE) which means there's no limit to the number you might print. You can charge a bit more for LE since there will be a limited number.
Whether it's LE or OE, sign or initial each print on the front. In your listing you'd specify that it's a signed print of your original watercolor.
For LE, you'd print say, a total of 25 (that number's up to you) and each print would be numbered - i.e. 1/25, 2/25 etc. I hand-write the number, name of the art, my signature & my web site on the back of my prints. I also include a printed COA (certificate of authenticity) that has pretty much the same info. COA's aren't necessary, but many of us provide them and some collectors want them.
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-Ann
"Animals are such agreeable friends, they ask no questions, they pass no criticisms." -- George Eliot
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Edited by drawdog5 at 12/12/2007 9:29 PM
-Ann
"I have got pepperoni. Wherever it lands, that's where the miracle will happen." ~ Gary Busey