HP Color LaserJet 5500 Technical Reference Manual page 271

YY = Media Code
01 Unknown Envelope
02 Letter Paper
03 Legal Paper
04 A4 Paper
05 Executive Paper
06 Ledger Paper
07 A3 Paper
08 COM10 Envelope
09 Monarch Envelope
10 C5 Envelope
11 DL Envelope
12 Japan B4 Paper
13 Japan B5 Paper
14 B5 Envelope
15 Custom Media Paper
16 J-Postcard
17 J-RoundTrip Postcard
18 A5 Paper
19 Letter-R Paper
20 A4-R Paper
21 A5-R Paper
22 Japan B5-R Paper
23 Exec-R Paper
24 A6 Paper
25 Foolscap Paper
26 Japan B6 Paper
Media Size
PJL Status Codes D-5