Size: 310mm x 302mm Perfect size, fits all of Panmer Outer sleeves. Our bevelled sleeves are designed not to get damaged when inserting into any plastic sleeves. Super Strong Only highest quality black paper is used when making our 12" Paper sleeves. Strong and non-toxic, acid free, safe for your vinyl's. Perfect for professional and domestic use Biggest vinyl pressing plants buy from Panmer, they trust our quality of products and we make sure our record sleeves are always top quality!