I used Mettler Silk Finish 50 weight mercerized cotton but a good quality thread for machine embroidery can also be used. Stitch in colors personal to your taste. This doily measures 7 inches in diameter.
For the 4×4 hoop.
This is a multi format set: You get the DST, EXP, HUS, JEF, PES, VIP, VP3 and XXX formats. Stitch charts and instructions are in the download folder.