RGhost::Constants::Papers::STANDARD

You can use the preset page size creating a new instance of document.

 doc=RGhost::Document.new :paper => :a5

Preset list

Paper name	Size(WxH)
“11×17”	[792,1224]
:a0	[2384,3370]
:a1	[1684,2384]
:a10	[73,105]
:a2	[1191,1684]
:a3	[842,1191]
:a4	[595,842]
:a4small	[595,842]
:a5	[420,595]
:a6	[297,420]
:a7	[210,297]
:a8	[148,210]
:a9	[105,148]
:archA	[648,864]
:archB	[864,1296]
:archC	[1296,1728]
:archD	[1728,2592]
:archE	[2592,3456]
:c0	[2599,3677]
:c1	[1837,2599]
:c2	[1298,1837]
:c3	[918,1298]
:c4	[649,918]
:c5	[459,649]
:c6	[323,459]
:flsa	[612,936]
:flse	[612,936]
:halfletter	[396,612]
:isob0	[2835,4008]
:isob1	[2004,2835]
:isob2	[1417,2004]
:isob3	[1001,1417]
:isob4	[709,1001]
:isob5	[499,709]
:isob6	[354,499]
:jisb0	[1030,1456]
:jisb1	[728,1030]
:jisb2	[515,728]
:jisb3	[364,515]
:jisb4	[257,364]
:jisb5	[182,257]
:jisb6	[128,182]
:ledger	[1224,792]
:legal	[612,1008]
:letter	[612,792]
:lettersmall	[612,792]