High insulation and blackout black curtains, 100cm wide x 235cm high, achieving a heat insulation effect of 57.7% and a heat retention/cooling effect of 33.1%. - Color: Black - Size: 100cm wide x 235cm high - Heat insulation effect: 57.7% - Heat retention/cooling effect: 33.1% - Function: Energy-saving curtains Thank you for viewing. I recently purchased the wrong size on Amazon. I bought them for ¥9820 x 2, totaling ¥19,640. There are 2 sets of 100 x 235 cm curtains, 2 panels per set. I opened one bag, but the items are unused. I checked the actual product, and it seems to be made of sturdy material with good blackout properties. Below is the product description from Amazon. Brand: Curtain Kurenai Color: Black (6104) Material: Flame-retardant/blackout fabric Opacity: Grade 1 blackout Features: Flame-retardant Room type: Living room 【K-wave-D series】 K-wave-D-plain ■Size: 100(width)cm x 235(length)cm x 2 panels ■Color: Black (6104) *We recommend requesting a sample from the size options in advance. *The brightness may vary depending on the color, even for the same grade 1 blackout curtains. *This product is a made-to-order product (made-to-order), so changes, cancellations, returns, and exchanges are not accepted after the order is confirmed. Sewing: 1.5 times the fullness / 2-tuck / shape-retaining processing Composition: 100% polyester Hooks: With adjuster hooks (standard A hook specification) Functions: Grade 1 blackout / Flame-retardant / Washable / Shape-retaining processing *For width sizes of 125cm, 150cm, and 200cm, there will always be seams between the fabrics (width seams) Regarding width seams... This product is made with 150cm wide fabric and 1.5 times the fullness, so when making curtains wider than 100cm, two fabrics will be joined together, and there will be seams between the fabrics. Please consider this in advance.