Our plates can hold very fine, small type.  As typefaces can vary in size, it’s impossible to name a minimum point size.  If you feel you might be pushing the limits, please send a pdf and we’ll let you know if it works.  The biggest issue around very small type is whether it is placed with larger, heavier elements in the design.  It is difficult to keep fine type and other detailed linework clean and crisp when it is placed next to something that requires a lot more ink to look good.