SOMETIMES YOU DON'T NEED THE WHOLE CIRCLE.
You are looking at a lot of 8 pieces of Lionel track 6-65554 which will make a half circle of 54" diameter. This is the full O gauge black tie tubular track, but it is a WIDER diameter for your circle. Instead of a 31 inch circle, the 054 makes a 54" circle.
It takes 16 sections to make a COMPLETE 54" circle, so you are getting a HAF circle. It matches up to the most common, traditional sized O gauge track in Lionel sets past and present (until FastTrack), USUALLY the track with black ties. It does not match up (height wise) to the smaller 027 type track. If you have questions about this, just send me a message!
CONDITION: C-7, used but clean. Some sections have a little bit of oxidation. Tops are clean. Sides, bottoms and ties may have oxidation and signs of use. All pins. Pictures are of the actual track you are buying.