They are gift card designs by Jollysmith and are the work of Kyle Smith, who has collaborated with John Green.
Known as Stripes Cards their friendly name belies some illustrative sorcery – stripes drawn at right angles to stripes within a familiar outline – which has dizzying and disorientating consequences.
Those outlines are 50, 18, or thirty, in case you haven’t seen them yet. Once you’ve got it though, it’s got you. Hours might pass, days even.
If you can tear yourself away you might care to know that the diameters are 150mm2 and that all cards are printed in the UK from ‘a sustainable source’ and supplied individually packaged in a cello bag with a white envelope.
They cost £2.50 each and are available from Contemporary Lab here.