PJ3 Opaque Poly Mailers are 250mm x 310mm making them larger than A4 and a versatile size for sending all kinds of small clothing items. Made from degradable 75 micron polythene that meets the highest industry standards, these mail bags offer effective protection against water damage, tears and punctures to ensure items arrive in great condition. Each bag has robust heat sealed edges and is fitted with a high tack adhesive strip that forms a secure, tamper evident seal to keep the contents safe and secure. Incredibly strong yet extremely lightweight, Poly Mailers keep your postage costs to a minimum.