We carry two sizes of 6" Glow Sticks: Superior Quality Jumbo 6" Glow Sticks (15 mm diameter) and Premium Quality Standard 6" Glow Sticks (10 mm diameter) Comparisons: Item Diameter (mm) Glow Hour Useful/Visible What use for Compare to Superior Quality Jumbo 6" Glow Sticks 15 mm Up to 12 hour/48 hours Safety, emergency, camping, parties and novelty uses Industrial safety grade Premium Quality Standard 6" Glow Sticks 10 mm Up to 8 hour/24 hours Parties and many novelty uses Most other web sellers 50 pcs Premium Quality 6" Glow Sticks 50 pcs Standard Size 6" Lightstick-10 mm Only $0.45/pc, with strings $ 22.50 Superior Quality 50 pcs 6" Bulk Glow Sticks Jumbo size-15 mm Only $0.60 each 50 pcs for $30.00 $ 30.00 ***Free Shipping*** Superior Quality 250 pcs 6" Bulk Glow Sticks ***Free Shipping*** Jumbo size-15 mm $0.55/pc, $137.5/case (250 pcs) $ 137.50 ***Free Shipping*** 500 Premium Quality 6" Glow Sticks ***Free Shipping*** 500 pcs Standard size-10 mm Only $0.35/pc $ 175.00 ***Free Shipping*** Superior Quality 500 pcs 6" Bulk Glow Sticks Jumbo size-15 mm $0.50/pc, $250/case (500 pcs) $0.40/pc, buy 5+cases $ 250.00 ***Free Shipping*** Premium Quality Standard Size 6" Glow Sticks ***Free Shipping*** Only $0.31/pcs, $310 pcs/case(1,000 pcs) $ 310.00 ***Free Shipping*** Superior Quality 6" Individually Foil Wrapped Glow Sticks Jumbo size-15 mm $0.58/pc, $278.40/case (480 pcs) Individual Foil Packed with Strings $0.55 each (5+cases) $ 278.40