A cute pun on the maths term perpendicular - a cat on the horizonatal line using the vertical line as a scratching post! In geometry, perpendicular lines are straight lines that intersect at a right angle.
Where to buy online
Direct from us here - see products featuring this design.
Elsewhere online
RedBubble (US)
TeePublic (US)
Threadless (US)
NeatoShop (US)
Design By Humans (US)
You can find the design on t-shirts in most stores, but also on other products depending on the store (e.g. hoodies, mugs, stickers, notebooks, phone cases, greeting cards, cushions, socks etc).