The answer to this question is easy: it depends!
We have 8 wool sizes available: #3, #4, #5, #6, #7, #8, #9, and #10.
If you don't have access to a cutter, and purchase uncut wool, larger strips of wool are much easier to cut, and for very primitive style rugs the strips can be ripped to cut.
Hand cutting the wool with scissors can be very time consuming, so either purchasing pre-cut strips, or using a cutter is a necessity for working with these small sizes. Fortunately, Loopy has the beautiful Bolivar Cutter from Nova Scotia. Small cuts are no problem! Interested in learning about more primitive style rug hooking? There are lots of websites that focus on this style.
There are a few things to consider when picking what width to hook with:
The look of the three pieces is also slightly different and uses a different number of wool strips:
These four pieces are all done on primitive linen, so it is possible to use a cut as small as a #4 on primitive linen, although this may be harder for beginners. With cuts higher than an #8 or #10, a special hook that is thicker (Hartman hook is an example) will widen the hole of the linen to allow the wool strip to easily pass through.