Skull Marks The Spot – Skull T-shirt Design So after sitting in the dusty halls of my mac for ages , we decided to drop this skull t-shirt design into our Design By Humans Collective store. This skull was originally created with fineliners and acrylic. This skull t-shirt is only available on black at the moment (we have a white version coming soon). It is also available as a ladies skull tee and as a variety of phone covers. Both mens and ladies tees are a supermely low £14.50. Get on that shit pronto.