The dimensions of the bottom of the handle is approx. 6" x 2"
Don't get this part confused with the very similar part, the 2PYR Handle Support, which is about 4 3/4'' x 1 7/8"

The 2PYR can be bought here: https://www.ebay.com/itm/374018270676

• Miter handle support 2VPR holds the miter handle in place on the table.
• It is 3D printed out of PETG plastic, which is strong.

Here is the Out of Stock link to the original Amazon listing for reference. 

https://www.amazon.ca/Craftsman-2VPR-Miter-Handle-Support/dp/B06W9NYZDD