レターサイズでしょう
retāsaizudeshō
1. Letter size, likely.; Probably letter size.
Noun
#2391352
1. Letter size, likely.; Probably letter size.
1. size
1. letter
1. love letter
1. bust-waist-hip measurements; vital statistics
1. newsletter
1. pocket-size
1. it seems; I think
2. right?; don't you agree?
1. Size of; Regarding size
1. By size; According to size