Can you make a bandsaw riser block out of wood? Yes, but...
If you're looking for how to make a riser block for your bandsaw, but don't want to pay for an expensive one, one doesn't exist for your model, or you simply prefer a diy option. this video will help walk you through the build process. It will also outline some of the key considerations, benefits, and shortcomings of using a riser block in general.
As promised, the equation referenced in the video is:
Saw blade length = (pi * R1) + (pi * R2) + (2 * C),
where,
R1 equals the radius of your top wheel, and R2 is the radius of the bottom wheel (almost always the same size)...and
C equals the distance from the center bolt of the top wheel to the center bolt of the bottom wheel.
