The size fits neatly into an average domestic oven and is of a good thickness. I've had other oven liners before and they are a great way of reducing the chore of oven cleaning. They do tend to flap a little in fan assisted ovens but the weight of this helps to reduce this. Haven't had it long enough to know how it withstands wear and dishwashing. Product is of good quality, arrived promptly and was well pacakaged.