I believe I have read they are about 1/16 narrow, so that would make them 1 3/8 instead of 1 7/16, by 2 5/8.
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My avatar is a sketch by my son who is an art school graduate. Some of his sketches and paintings are at
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He is available to do custom drawings in graphite, charcoal and other media. He also sells some of his works as note cards/greeting cards on Etsy under JamesSpaethArt.
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