Sony PCM-D50 and Edirol R-09
The measurements reported by the manufacturers:
Edirol R-09
2-1/2 x 4-1/16 x 1-3/16 in.
63 x 102 x 29 mm
5.15 oz (146g) with 2 AA batteries
Sony PCM-D50
2-7/8" x 6-1/8" x 1-5/16"
74 x 155 x 33mm
12.88 oz (365g) including 4 AA batteries
So the D50 is 3/8" wider, 2 1/8" taller, and 1/4" thicker
The D50 is also more than twice as heavy, 7.73 oz (219 g) more.
Some of that is 2 extra AA batteries, but most of the difference
is in the D-50's metal case.
Flintstone