縦たて長なが

na-adjective, noun which may take the genitive case particle 'no', noun

oblong; vertically long; portrait orientation

Describes something that is longer in the vertical direction than the horizontal. Can refer to shapes, writing styles, or screen orientations.

• この封ふう筒とうは縦たて長ながです。

  This envelope is vertically long.

• 写しゃ真しんを縦たて長ながにトリミングした。

  I cropped the photo to portrait orientation.