The sizes are faily close the #16 could have been a touch longer but the #18 was perfect. What I found to be the nicest aspect of the 100 packs is no need for hackle pliers till you get to the nitty gritty. To sit down with a cup and box of 100 hooks its the way to go, it keeps me on track. I'll sit down with a plan in my head and I'll start to wander from it with a choice of sizes and so on but with only enough for a certain ammount of a certain pattern I can stick to my game plan easier.