Since the length isn't specified, it's unclear, but given the 145cm width and 6kg weight, it's likely a standard thickness canvas roll of 10m. As it's unused and unopened, I believe you can determine the details based on the width and weight. I will wrap it in air-cushion packaging for shipping. The last two photos show the front and back of the same type of canvas. For reference. Here's some information from AI as a guide: 　Weight　　10 m roll　　　　 5 m roll Thin 300 g/m²14.5 × 300 = 4.35 kg7.25 × 300 = 2.18 kg Standard 400 g/m²14.5 × 400 = 5.8 kg　　 7.25 × 400 = 2.9 kg Thick 500 g/m²14.5 × 500 = 7.25 kg7.25 × 500 = 3.63 kg