I have the Kmart highchair and the mat doesn't fit correctly. The mat has sharp corners and the chair has more rounded corners on the tray. Having said that it's still a great product if you don't mind that it doesn't fit correctly.
High quality placemat, I love the look and feel of them. The range of colours and the colours themselves is excellent and I am enjoying them in green and blue. I'll be ordering more in the future!