The Service Dog Patch is offered as a pair of patches, as described in the product details. This listing is presented by thetopdogpetstore.
Wasn't sure a two-pack would be enough but it's actually perfect since I rotate between two vests. The patches themselves are nice and stiff, they don't curl up at the corners like the flimsy ones I had before.
Ordered these for my girl's vest and the stitching around the border is way more solid than the cheap ones I've bought before. Both patches went on easy with velcro backing and haven't curled at the edges after a few weeks of daily walks.
They arrive as a pair which is handy, though the patch itself feels a bit thinner than I'd like for everyday wear. It does the job for identifying my dog, but I'm not sure how it'll hold up after a few washes.