I have been struggling with some of my letter stamps. I have 4 or 5 different sets. Some are rubber stamps, one interlocking set that is designed for clay, and another metal set that I believe are jeweler's stamps. My largest font are rubber stamps and they are not well made, making it difficult to line the letters up. They are also not very deep, which means I am often carving them out. The stamps that I use on the standard piggy banks is starting to show some wear, particularly the letter "A." Last month I searched the web for a deeper set of stamps, with a font that appealed to me. The only one I found was $66 dollars. The size was fine for the standard size piggy bank, but really too small for the large pigs. I decided I needed to think about it before plunking down the dough.
Lo and behold, last week on facebook, another potter posted a link to these "stone stamps". She was using them to letter dog bowls. I was able to order a set for under $5 and have them shipped to Walmart for free. I wasn't sure how easy they would be to work with, since there is no handle or guides on them... but for less than five bucks I was willing to take a chance.
I practiced on a salt pig and once I got the hang of it, moved on to orders. The size is great for the big piggy banks, and will work well for short names on the smaller banks. Lining them up was pretty easy. Now I wish they were available in a smaller font too!