I bought this set a little over a year ago for a few thousand yen. It's a size M. It's made by Gunze, so the sewing is meticulous. The fabric is 60% cotton and 40% polyester. It's for spring and autumn. I intended to use it, so I removed the tags and washed it once lightly. After that, I never wore it and have kept it stored. Approximate flat measurements: Top: Length: 69cm Shoulder width: 47cm Width under the armpits: 51cm Sleeve length: 54cm Pants: Length: 95cm Waist width: 59cm Width of the torso: 33cm (Torso circumference: 66cm) There's a sturdy 2cm wide elastic waistband, so I think it will only stretch to about 68cm to 70cm around the waist. Any larger than that, and the waist might feel tight.