If you don't like the standard strap on your Seiko Sumo, you might like the bold Endmill style which also has a higher quality clasp than the standard Sumo Bracelet. The bracelet fitted my sumo perfectly and didn't need to be sanded or shaved. Note, however, that the bracelet color does not match perfectly. The difference is negligible, so you have to get used to it. Also, the end mill is heavier than a standard bracelet, which should also be taken into account. However, if you like the style of the Endmill and want a higher quality strap than the standard strap on your 20mm watch, then I would highly recommend this Endmill.
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