Whisker biscuits come in different sizes, materials, and styles. The best whisker biscuit size should have at least a 0.03 width gap near the top of the arrow, so it is not too loose or tight. As you finally decide to use a whisker biscuit, you may wonder which size you should choose. It can be challenging to decide on because whisker biscuits come in different sizes, materials, and styles. Therefore, you won’t run out of options for finding a whisker biscuit with the correct size. Below is the whisker biscuit size table to help you determine which one to buy: Whisker Biscuit Size Arrow Type Small (0.300” inner diameter) Outsert Carbon, Trophy Ridge, Axis, ACC, 17XX, or Smaller Aluminum Medium (0.320” inner diameter) Carbon, Internal Component, 19XX or Smaller Aluminum Large (0.385” inner diameter) 23XX or Smaller Aluminum Fishing type (0.360” inner diameter) Limited to unfletched fishing arrows The table above shows that each size corresponds to an arrow type. If your arrow is among the ones listed above, you can use the table as a reference in choosing which whisker biscuit size to follow for your next purchase. As a general rule in choosing the right whisker biscuit size, a tight fit is terrible while a loose fit is good. A tight fit will produce more noise and lead to left-right errors due to hand torque. Therefore, the best whisker biscuit size should have at least a 0.03 width gap near the top of the arrow so it is not too loose or tight. If you notice that the arrow is filling the whole area of the whisker biscuit, that indicates that the whisker biscuit might be too tight for your arrow. Always remember that you will have a better experience using a larger whisker biscuit. It should be loose enough that you can see a small gap between the whisker biscuit and the top of the arrow. Moreover, a good whisker biscuit should have the following qualities: adjustable, light, and durable. Since all whisker biscuits are interchangeable, there is a higher chance of providing a better fit for your bow. Thus, instead of switching the arrow size to fit, it is better to change whisker biscuits.