Shapton Glass Stone 320 Grit Sharpening Stone Paring/Petty/Utility Knives 20 cm (8") is the

20 cm (8") is the usual standard length for home or professional use

The finish is kuro-uchi (black) with a lacquer coating -- this helps protect the steel and should not be polished off

and the 8cm/3" Wusthof Classic Ikon paring knife

this is a great choice

Shapton Glass Stone 320 Grit Sharpening Stone Paring/Petty/Utility Knives 20 cm (8") is theShapton Glass Stone, 320 Grit, #50301 210mm x 70mm, 5mm thick (total thickness is 10mm: 5mm of abrasive bonded to 5mm glass plate). Shapton GlassStones are very fast cutting and long lasting. The ceramic abrasive is permanently bonded to a glass plate so the whole unit is very flat and very strong. The abrasive is extremely consistent and dense so you have a great feel and can produce very precise and clean edges, plus these have the convenience of