Standard Biscuit Joiner Sizes
If you are planning on a new woodworking project, you may have to contemplate which biscuit joiner size you will need to get the job done. A biscuit joiner can be used to connect two pieces of wood together without the use of nails and screws. Biscuit joiners look a lot like a football, and many of them have grids on the top and bottom to hold the glue securely in place. For installation, a hole is cut into both pieces of wood that is the right size for the biscuit in play. After a bit of glue, the biscuit can be inserted into the slots and will hold the two pieces together after it expands within the wood. This is great for creating a seamless look with your woodworking pieces.
If you are wondering which biscuit joiner size will be right for your project, consider the explanations below for a breakdown. Note that all biscuit joiners are 5/32 inch thick, so the only thing changing here is the width of the oval.
Small Biscuit Joiners - #0
#0 biscuit joiners are 1 3/4 inch long and 5/8 inch tall. The smallest of the sizes, this model can be used for connecting smaller pieces of wood or in areas where there isn't a lot of anticipated stress. Stress will break these little biscuit joiners quite easily, so it is best to leave that part up to wider models. Picture frames often feature this size joiner because of their lack of stress and small wooden pieces. These biscuits work well in narrow settings as well, like if you need to put a frame around a kitchen cabinet door.
Medium Biscuit Joiners - #10
#10 biscuit joiners are 2 1/8 inch long and 3/4 inch tall. They are the fall back pieces for just about any project, being not too big or too small. They are great for various framing projects, and if your local hardware store only contains one type of biscuit joiner, you can bet that this will be it.
Large Biscuit Joiners - #20
#20 biscuit joiners are 2 3/8 inch long and a full 1 inch tall. These are made for projects where a lot of twisting or weight will come into play. Unlike the options above, these joiners work well with plywood and particleboard, which usually can't be joined without a great deal of hassle. The benefit of using such a large biscuit is that you have a bigger space to apply glue to and you have a stronger hold inside. Sometimes these joiners are just too big for the task at hand, however.
Choosing the Right Size
If you are having difficulty selecting the right sized joiner for your project, go with a smaller option and see how it holds up. You can always cut a bigger hole for a bigger biscuit. It's hard to work when you do things the other way around. Make sure that you only apply glue to your biscuits right before insertion because they will expand on contact. That's what gives them their hold in the first place.