It's actually the XL taco. Because of the XX grill lines, you can kinda see it under the wrapper but I'm not sure how big it actually is. Still, a human can only really fit an L in their stomach and, like I said, it may not be /ck/ approved but if you're ever visiting France and there's a well run french taco joint it's not a bad idea to try maybe. At least, it was my guilty pleasure.
https://www.google.com/maps/place/O'Tacos/@48.5773048,7.7698164,3a,75y,90t/data=!3m8!1e2!3m6!1sCIHM0ogKEICAgICWpMH3aA!2e10!3e12!6shttps:%2F%2Flh3.googleusercontent.com%2Fgps-cs-s%2FAC9h4nqgnoTDUhv9hmRoYO2QOMmvpDchtAMeO05x-BjrgA4wSb-wz-hY2XpfSflLIJ_Tao_G61PJPc7DSvApGUNYtAtloi9GPyuGIo-W-WASUji0CE1ST_UWA53amqaMcmZaBQnHkfbe%3Dw222-h100-k-no!7i4000!8i1800!4m9!3m8!1s0x4796c902ac9e7a8d:0x222166f991d13d55!8m2!3d48.5773048!4d7.7698164!10e5!14m1!1BCgIYIQ!16s%2Fg%2F11cs69n1np?entry=ttu&g_ep=EgoyMDI1MDcyMC4wIKXMDSoASAFQAw%3D%3D#