This is a Laowa lens that has a 0.09-metre minimum focusing distance and a 90 mm maximum focal length. If you want to use a filter on the lens, then the filter size is 67 mm.
From WEX Photo Video
Laowa 90mm f2.8 2x Ultra Macro APO Lens for Canon RF
Carmarthen Cameras
Laowa 90mm f2.8 2X Ultra Macro APO Lens - Canon RF