I have these 3D MAXpider Mazda CX-9 CX9 2016-2020 Custom Fit All-Weather Car Floor Mats Liners, Kagu Series (1st & 2nd & 3rd Row, Black) for our 2019 Signature. It’s a perfect fit.

I chose the OEM Cargo Liner so I can fold the 3rd row seats separately.

I bought these 3D MAXpider L1MZ05701509 All-Weather Floor Mats for Mazda CX-9 CX9 2016 2017 2018 2019 2020 2021. For the cargo, I bought the OEM cargo mats since I wanted to be able to fold the 3rd row independently but still cover it.