My husband has tried various other brands of socks ,none of which
remotely resembled the L/XL I chose for him.
He finds Posey socks comfortable and true to advertised sizing.

Configura Comfort Backrest Pillow Set, Beige VP
2 x Backrest Cushions and 1 x Headrest
Configura Comfort Backrest Pillow Set in Beige VP. Suitable for all Configura Comfort sizes.