They can be used alone also, but because of all the swirls...some combinations of letters may not look exactly right together if you don't use some of the more plain letters that are included in the basic set.
The alphabet size included is 1 1/4" (to match the basic set), however these letters are quite a bit larger because of all the extra swirls and flourishes. If you are using a 4x4 hoop some letters will not fit.
These are files for embroidery machines - NOT a finished item.
The following formats are included in the download: PES, DST, EXP, HUS, JEF, VP3, VIP, and XXX.
Also includes .BX format that works with Embrilliance Essentials, AlphaTricks, and Designers Gallery EmbroideryWorks that will allow you to use the letters as a keyboard font.