What they're listing as 4-7/16 is the 4.40" action length, they just insist on being different for some dumb reason. Their customer support people aren't well versed in the nuances of Savage 110's to be able to answer simple question such as yours.


Using their menu's, select the following:

Make: Savage
Model: 11 Bottom Bolt Release or 11 Top Bolt Release (whichever your rifle has - likely bottom bolt release)
Action: Short Action, Detachable Magazine

That should show an At-One Thumbhole option for ya.