"Just because you can't see, doesn't mean it doesn't exist" Stress Free Service Dog Patches. Patch is handmade and weather resistant. Easily wipes clean with soap and water or your favorite pre-mositened wipe. 100% waterproof! Will not hold dirt and germs the way other patches will as it is plastic, not fabric. Can be easily disinfected. PATCHES HAVE HOOK SIDE VELCRO. If loop side is required, message us to see if request can accommodated. IMPORTANT: In order to keep price reasonable, this item ships without tracking. 3.5" x 2"