Hi Kathy, Thank you for your question. The base on the model 70035-SS robe hook measures 2-3/16" in diameter.
Here is a link to the model spec sheet.
http://www.deltafaucet.com/customersupport/documentation/70035-ss.html?document=ts&fromDetailArea=bath&documentIndex=0#flashWrapper
Thanks,
Dave
Answered by: DeltaFaucet2
Date published: 2015-01-12