Help - Terminology

[Martin-351631]

I have recently got my old scalextric set out of the attic for my niece and nephew. It is the simple extended figure of 8 track, blue vs yellow bugatti set.

I am looking for more tracks pieces/cars to extend the set for them.

My question is this, is there any terms, I should be making sure the pieces include or exclude in their descriptions to make sure they fit with the parts I already have?

[Andy P.]

There were two different Bugatti sets, one Sport (1/32 scale about the palm of your hand size) and one Micro (1/64 scale, about the size of matchbox/Hotwheel cars)...

Which do you have?