The paper ratio of the Liene photo printer is 2:3. 4:3 photos taken with your phone will be cropped a bit if you print directly from your photo album. If you don't want the photo to be cropped, we recommend that you select "No Crop Mode" when previewing the photo in the Liene APP.In addition, when the photo is larger than 1200x1800 pixels, the photo will be compressed to 1200x1800 pixels, the ratio is 3:2, 1M size, when the photo is smaller than 1200x1800 pixels, the app will prompt, or you can choose to continue printing to the original pixels as needed.