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 IMPORTANT NOTICE ABOUT COLORS: Red color is archived by using tinted casings. Due to this nature, the brightness and duration of glow is lower and shorter than other colors using clear casings, such as Green, Yellow, Blue and White colors. Our Red color is like "American Beauty Red Rose" color. 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 $0.59 each 50 pcs for $29.50 $ 29.50 Superior Quality 250 pcs 6" Bulk Glow Sticks Jumbo size-15 mm $0.49/pc, $122.5/case (250 pcs) $ 122.50 500 Premium Quality 6" Glow Sticks 500 pcs Standard size-10 mm Only $0.35/pc $ 175.00 Superior Quality 500 pcs 6" Bulk Glow Sticks Jumbo size-15 mm $0.44/pc, $220/case (500 pcs) $0.42/pc, buy 5+cases $ 220.00 Premium Quality Standard Size 6" Glow Sticks Standard size-10 mm diameter $0.29/pcs, $290 pcs/case(1,000 pcs) $0.28/pc, (buy 2+cases) $0.25/pcs, (buy 5+cases) $ 290.00 Superior Quality 6" Individually Foil Wrapped Glow Sticks Jumbo size-15 mm $0.48/pc, $230.40/case (480 pcs) Individual Foil Packed with Strings $0.45 each (5+cases) $ 230.40