noun
L size; large size
Refers to a standard paper or photo print size (89×127 mm), commonly used for photographs.
写真をＬ判でプリントしてください。
Please print the photos in L size.
Ｌ判の用紙が切れたので、買いに行きます。
We're out of L-size paper, so I'll go buy some.
From English 'L' (large) + 判 (size).