She got it on Amazon.

https://www.amazon.com/31-5x11-8-Non-Slip-Extended-Computer-Accessories/dp/B07R6TK8XP

I bought this picture as a desk mat on Amazon and I love it. Would recommend

Edit : I ordered it in September last year but looks like it's not available

31.5x11.8 Inch Cool Legend Black Mamba Kobe Non-Slip Rubber Extended Large Gaming Mouse Pad with Stitched Edges Computer Keyboard Mouse Mat PC Accessories (7-Kobe Move) https://www.amazon.com/dp/B07R6TK8XP/ref=cm_sw_r_cp_api_i_ZGntEbTBKFRYQ