Whilst I think there's a time and a place for IKEA products, if you've tried the IKEA Kolon Floor Protector, priced at £18.99, you'll know exactly what I'm about to say - put your money towards a floor mat from www.floor-mats.co.uk.
No sooner had I laid the IKEA product down and sat on my chair just once this happened - crack. Followed by crack after crack after crack. After a week's use it looked like a smashed window.
I soon had to look for an new solution and floor-mats.co.uk provided it. I've got a 90x120cm PP Chair Mat and it's absolutely brilliant. It doesn't move, it doesn't damage the carpet and best of all, it effortlessly supports all 101kg of my weight together with my chair. Its frosted effect is attractive too.
A great service and a super product. Thoroughly recommended.
I use a five caster desk chair on carpet in my home office. I am at the desk for the full working week. I ordered the 90x120 size mat as the smaller size does not leave enough room to move from side to side. It fits perfectly. The casters run smoothly on the plastic surface. Importantly, the spikes on the under-surface of the mat stop the mat from creeping. This was a problem with my last mat which was smooth on both sides. Great product. I'll come back with a bigger recommendation when it has lasted more than a year without cracking. That seems to be the way with all the mats I have owned over the last 20 years.
I bought a PP Chair Mat, 120x130cm, to replace a PVC mat of the same size which in two years had become embrittled and had disintegrated. The mat is laid on a high density 80% wool twist pile carpet. I had no problems at all with the PVC mat moving around but the PP mat has shorter spikes. These are not long enough to lock into the carpet and prevent slippage of the mat.
Had it for less than a month. Seems to be good quality, but will need to use it for much longer before I can truthfully comment. I bought it to replace a different one that cracked after about 4 years use.