The one row button hole technique creates a durable and firm knitted button hole that will stand up to a lot of abuse. It has a nice finished edge but it is a little more complicated than other types of button holes. One advantage of this technique is it will not interrupt you pattern since the hole is made within one row.
Step 1: Once you’ve reached to point in your knitting where you want to place the button, bring the working yarn forward.
Step 2: Slip the next stitch from your main needle purl wise.
Step 3: Bring the working yarn back.
Step 4: Slip the next stitch from your main needle purl wise again.
Step 5: Pass the second stitch on your working needle over the first stitch.
Repeat steps 4 and 5 for as many stitches as is needed to fit your button.
Step 6: Turn your work over.
Note: You may want to pull very tight on your working yarn before the next step and continue pulling tight for the first stitch. This will prevent or limit holes next to the buttonhole.
Step 8: Turn your work over again.
Step 9: Slip the next stitch from you main needle purl wise.
Step 10: Pass the additional stitch from you cast on over the first stitch on your working needle.
Step 11: Pass the first stitch on your working needle back to the main needle.
Step 12: Work the next stitch in pattern and continue knitting as normal.
Note: You may need to k2tog/ p2tog or through the back loop to tighten up any loose stitches.