Envelope, Kakuni Size, High Quality, 250g Coated Cardboard, Mail Service *Kakuni size is also known as Kakugata No. 2, an irregular size that fits A4 size without folding. Along with long No. 3 envelopes, it is one of the most commonly used shapes for company envelopes. A4 A4 clear file fits. Slightly smaller outer dimensions than Yu-Packet, Yu-Packet Post, Click Post maximum size, and Nekopos. It's Kakuni size. Even if you put A4 copy paper in a slightly larger clear file, it can be inserted smoothly. Because it's an envelope-type case, there's no need to assemble it. Double-sided tape is attached to the flap, allowing for efficient packing work. Dimensions (outer): Length 332 x Width 240 + Flap 55mm, Gusset 2.5mm Material: Coated cardboard Color: White Sealing tape included Opening zipper included Format: Horizontal envelope Material: 250g/㎡ (thick paper (coated cardboard)) Weight: Approximately 45 g per sheet #Yu-Packet Compatible #Yu-Packet Post Compatible #Click Post Compatible #Thick Paper Envelope #A4 Size Thick Paper Envelope #A4 Size #Thick Paper Envelope