SONY UPC-21S ULTRASOUND IMAGING PAPER. A6 Small-size color print pack for use with UP-27MD, UP-D25MD, UP-25MD, UP-D23MD, UP-21MD, UP-D21MD, UP-20 Printers. Size of paper sheet is 4" x 3-5/8". Print size is 3.8" x 2.9". Each pack contains 240 prints of paper and ribbon (80 sheets x 3 packs). Price per pack.