Vans Sk8-Hi Tapered Stackform Shoes. The Sk8-Hi Tapered Stackform refreshes our deconstructed high top silhouette with an even chunkier take on the platform aesthetic. Constructed with a 34 mm sidewall height, this platform shoe elevates a legendary favorite while bringing a new “Off The Wall” style to your look. Along with traditional suede and canvas uppers, the Sk8-Hi Tapered Stackform features a more slender and fitted silhouette than the traditional Sk8-Hi. It is finished with signature rubber waffle outsoles.