Thickness of Skin Graft Blade

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To the Editor.—The article by Dr. Vecchione entitled "A Technique for Obtaining Uniform Split-Thickness Skin Grafts" (Arch Surg 109:837, 1974) contains an obvious error. The No. 15 Bard-Parker knife blade illustrated is described as being "about 0.17^×10−3 cm" thick. This is 0.000067 (67 millionths) of an inch, which is very thin indeed.