These are Scuba Max brand and are a good, light weight, very thin water sock.

When laid flat, they are 12 inches x 4 inches.

They are nicely soft.

The only letdown is that the seams are not flat seams, but standard seams.  The soft material mitigates this, but the seams do protrude quite a bit.  Wearing them inside out can further smooth the inner feel.

I don't know of any better alternatives at the moment.

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