Versa Gripps? PRO Glove Weight Lifting Straps Hooks [Misc.] Black/medium/large AD

I want to buy it as a gift because my husband lift weights and he has weak wrist. Would this be a good gift?

is the reg/large has bigger and longer palm piece than small?

Can these straps be effectively used for deadlifts as well as bench pressing?

is it best to size up or down? My wrist is 6" but I'm not sure if I should do x-small or small?