W 15.5cm, H 10cm, D 2cm, 155g Outer leather 3mm thick, inner leather 1.5mm thick vegetable-tanned leather, linen thread, brass fittings ○ Shipping Method Recycled + very simple packaging ○ Care Instructions Apply oil 2-3 times a year, or when the leather feels dry, following the steps below. Mink oil, horse oil, or neatsfoot oil are recommended. ・Remove surface dirt with a dry cloth or brush. ・Apply a thin layer of oil with your finger or a cloth and leave it overnight. ・Wipe off excess oil with a dry cloth or brush.