What does w/16 and w/15 mean?

[phamvh]

I have a 2012 hatchback LE Yaris. Need to shop for parts (fender liner) but on websites, they give two options: "w/15 wheels" and "w/16 wheels". What do these mean? And how/where do I find out about this information for my car?
Thanks

[Kaotic Lazagna]

That's the wheel diameter. You can find that out by looking at your tires. There should be 3 numbers somewhere that read xxx/xx/xx. The last "xx" is where the wheel diameter will be indicated. So look for 15 or 16 there.

[phamvh]

Aw, thanks. Do you think the bumper cover depends on the wheel diameter? Looks like the fender liner does because they have 2 options for it.

[Kaotic Lazagna]

Aw, thanks. Do you think the bumper cover depends on the wheel diameter? Looks like the fender liner does because they have 2 options for it.

It shouldn't, at least for my sedan. I'm not sure if Toyota took the time and effort to make two separate fender liners for the 3rd gens. I really don't think there would be a difference, and would just go with the cheaper of the two.