Diy Knife Holder . Also, you can get the customization that retailers simply do not offer. Cut out a block of flat wood to size. Knife Holder 6 knife capacity in 2020 knife holder, Knife from www.pinterest.com Create a fixture for the groove. Ours is 2 tall and 16 wide, from 3/4 thick cherry. Cost wise, the diy magnetic knife holder can often save you money compared to commercial options.