OEM ball mount hole size

[RCs4Runner]

Can someone with a OEM ball mount (pt228-89445) measure the hole for me so I can order the ball with the correct size shank.

Thanks!

EDIT: Its 1 1/4".....

 

[snowbrdr033]

Pretty sure it's the standard size shank that fits in there unless it's for a smaller 4R or towing vehicle. It may be the 1 1/4"?

 

[RCs4Runner]

Its for a 1st gen GX.

Ive emailed several ebay sellers. Some said 1", others have said 1 1/4". I guess I'll just wait until I receive it and measure it myself. Im not sure how people can measure the same part number and get different hole sizes.