Our Size 4 Plus Bubble Lined Bags™ measure 225 x 330mm internally and 250 x 350mm externally – perfect for sending A4 sized heavy items. Made with an extra strength oyster kraft outer and our usual high-slip coating on the bubble wrap interior for snag-free packing, these Plus Bubble Lined Bags™ are quick and easy to pack and well protected from tears and punctures so will keep your products safe during transit. Size 4 Plus Bubble Lined Bags™ are a low-cost, high quality alternative to Size 7 Arofol Plus and Mail Lite G-4 Bags and have 100 bags per box.   Please note, due to manufacturing tolerances, bag dimensions may vary slightly.