BRANDSLOCKLeather Cowboy Hat for Men Women Handcrafted Western Shapeable Wide Brim Durable Cowgirl Outback Hat Brown

The size guide in images states that 57-58 cm is size M and the size guide states that it is L. Which chart is correct?

Is it waterproof?

The size guide states that 57-58 cm is size M and the size guide states that it is L. Which chart is correct?

what is the brim width of this hat?