If you tell me what you're shipping, I can recommend the exact size and thickness to minimize your costs: (e.g., t-shirts, books, bulky hoodies)
Wholesale Poly Mailers 6" x 9" (15cm x 27cm) / 2.4 mil (60 micron) / 10000 Go to product viewer dialog for this item.
500 10x13 Polysells Poly Mailers Envelopes Self Sealing Shipping eBay - polysells Go to product viewer dialog for this item. Sjpack 100pcs 14.5x19 Poly Mailers Walmart - SJPACK INC. Go to product viewer dialog for this item.
: Look for "Size 0" mailers. US Poly Pack offers some of the lowest prices for 1,000-count cases.