Available sizes: 3.5,4.5,5,6,6.5,3,7,5.5,4,3.5,4,14. 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.