Available sizes: 3.5,4.5,5,6,6.5,7.5,3,7,8.5,14,5.5,4,3.5,4,14. Vans Slip-ons (Shoes) Classic Slip-On Available in women's sizes. by Vans . Launched in 1979, the slip on was first worn by skateboarders and BMX riders in California before Sean Penn made them famous in the 1982 film