Medium Moving & Shipping Boxes 12 x 12 x 3 inches (5-Pack) - Extra Strength 200 lb vs Regular - Corrugated Durable Boxes for Packaging - Shipping Box Medium - Heavy Duty Box by IDL Packaging 12 x 12 x 3" (Medium Boxes) Pack of 5 is up for auction in Office Products. The current bid is $6.50, 78% below the $29.19 MSRP, in New/Like New condition. This auction has ended — similar items appear in live auctions regularly.