stock c6 yoke diameter

The slip yoke on the driveshaft i just had made is 1-7/8 diameter and i think it should be 1-11/16 i just want to make sure ?

Wow i thought the trans guru's would've had this one licked no problem I got to the bottem of it today anyway,the shop put a very early year c6 slip yoke on it that is 1.885 dia vs. the more common 1.685 dia slip yoke, so ups will pick it up and send it back to them so they can swap it out for the right one and get it back to me.