The product dimensions for the RCA converter are listed as 5.1 x 7.5 x 1.4 inches. It also claims to weigh 1.8 pounds, which is probably the boxed weight, including the wall wart power supply. I would guess most of them are in this general size and weight range. I have had good luck with the RCA converter but know others who haven't.

- Eric
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You are never beaten until you admit it. - - General George S. Patton