Hi, Carol. Thanks for the question. Size 5 is a heavier weight of pearl cotton, used often for needlepoint and sometimes for surface embroidery. The size of pearl cotton you use will depend on the project you are doing. If you are not sure what size to use, feel free to give us an idea of your project and we can give you a recommendation. Weeks Pearl Cotton #5 comes 10 yards per skein.

~Heather
[email protected]