Size Code	Length	Width	Thickness	Power Rating (mW)	Voltage Rating (V)	Thermal Resistance (°C/W)	Download Available
0302	.030	.020	.012	35	15	67.7	0302std.pdf
0402	.040	.020	.015	50	30	83.2	0402std.pdf
0403	.045	.030	.015	50	30	56.3	0403std.pdf
0404	.040	.040	.015	50	25	45.2	0404std.pdf
0502	.050	.025	.015	60	40	85.3	0502std.pdf
0504	.050	.040	.015	125	40	61.5	0504std.pdf
0505	.050	.050	.015	125	40	45.5	0505std.pdf
0603	.060	.030	.015	100	45	78.4	0603std.pdf
0705	.075	.050	.015	200	50	62.9	0705std.pdf
1005	.100	.050	.015	250	75	81.5	1005std.pdf
1010	.100	.100	.015	500	75	39.2	1010std.pdf
1206	.125	.060	.015	250	100	77.1	1206std.pdf
1505	.150	.050	.020	330	125	90.2	1505std.pdf
2010	.200	.100	.025	1000	150	48.4	2010std.pdf
2208	.225	.075	.025	750	175	72.7	2208std.pdf
2512	.250	.125	.025	2000	200	44.5	2512std.pdf

Nominal measuements are in inches.
ROHS compliance information may be found here.
Size 0504 is not available in Type A.
Size 0705 is usually the most economical. Its use is recomended except where its size is excessive or where power and/or voltage may be exceeded.