Shopping for Rugs at Ikea

I was helping Dottie figure out if there were any appropriate rugs at Ikea for her new apartment - but not all the rugs had sizes & prices on the floor nor were they all in the catlogue, making it very difficult to figure out. Now don't groan - there's an art to getting in and out of Ikea without getting lost (and preferably without buying anything). It's called Ikea-do. Wish I had a black belt in it but I don't ;)