Mailed by first class package from Los Angeles, California for fast shipping to the western states.
These washers fit in hose bibbs made in China, which have a washer slightly smaller than the 00 washer. (Generally, made in USA hose bibbs take a 00 washer, or a beveled .25 inch washer.)
Please check that the 00 washer is too large for your hose bibb, and that it’s using a flat washer, not a beveled washer.
Each washer has lasted around one year for me. With less surface area, the rubber wears out a bit sooner than the 00 washer. Replacement is simple.
If it doesn’t fit, you can return it, at your cost.