Yeowww! Catnip is powerfully potent. Even cats who don't normally respond to catnip will go crazy over this stuff. This is what I use in all my cat toys and I've yet to find anything better. It's 100% organic; no chemicals or pesticides are used in cultivation, so it's completely safe for cats and humans. We currently offer three sizes: mini (a great "taste-testing" size!), .5 ounce, and 1 ounce.