Two and four ounce spools is ideal one-time projects, hobbyists, crafts people, or just experimenting. They are priced around $10.
Polyester thread on two and four ounce spools that are about 2.5 inches at the base and 4 inches high.

New ! All Groz-Beckert Machine Needles and C.S. Osborne Hand Sewing Needle Kits