Fekey&JF Women's Witch Kinitted-Wool Hats, for Halloween Party Masquerade Cosplay Costume Accessory and Daily

The profile photo shows the hat to have a flat bottom, but the pictures in the details seem to have a wavy bottom. Which is it please??

Does the hat stretch at all? I have a big head and hope it will stretch a bit to fit as hats do not normally fig me well

Is this hat comfortable to wear in the sun?

Is the red color more red or more wine/burgundy in color?