Thank you for viewing. These are deer leather trout gums with hook size #10. If you win the auction, please select 20 colors of your choice. Each square in the photo is 1 cm. Thank you. Please take a look at my other listings if you'd like. Size: Hook size #10, barbless, approximately 0.4 grams when dry. Color: Bead color is gold. Fly colors are (from top left): black, white, dark brown, brown, natural, blue, sky blue, purple, orange, red, pink, light pink, yellow, lemon yellow, green, olive, lime green, gold, silver, and bronze. If you have any other requests, please contact me via the question section. I will do my best to accommodate your needs. Fishing type...Fly Fishing type...Lure Fish species...Trout/Salmon/Tokishirazu (immature salmon) Features...For area trout, handmade, sinking