Bought the Schwinn Towel Hook Z093-UT-20, what size screw an anchor should I use to place on wall. (Schwinn Design Z093 3/4" c.c. Hook (Polished Chrome))

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Bought the Schwinn Towel Hook Z093-UT-20, what size screw an anchor should I use to place on wall. Schwinn Design Z093 3/4" c.c. Hook (Polished Chrome)