I made this antenna 109″ each side so I could use it on both 10 and 11 meters. If you just want to make it for cb, try 110-111″ each side.
If you aren’t good at soldering, or don’t have connectors, use wire nuts and electrical tape. It will work just fine. Connect one side of the loop to the center of the coax and the other side to the shield. I would use mini 8 (rg8x). rg8 or LMR400 would be too heavy. Mini 8 is fine for 30MHz and less for 100′ run.