Just a note - I haven’t made any of these patterns - the recommendation to use them is based purely on fabric requirements (something with around 20% stretch) and the shape of the line drawings. Make sure the business end of the snap is on the right side of the fabric - the cap will be enclosed in the hem. Make sure all the KAM snaps you install on your kitty insert are the same type - either all “male” or all “female” - not a mix of both.

Theo is a bit of a velcro kitty. He likes to be where the people are at all times, and it is a great travesty to him that he is so small - his preferred vantage point from which to watch the world is much more human-height than cat height. What I’m saying is that he likes to be carried. He’s also - at just over 8 months old - already pushing the 5kg mark and friends, my arms are just not strong enough. First, sew the Kitty Insert together (with french seams) and press the mouth opening 1/4” followed by 1 1/4” - don’t topstitch that closed just yet! Open the hem out and Measure out every 7cm or so, and install KAM snaps around the top edge of the opening. You want these to be centered within that 1 1/4” section - between the two crease lines you ironed. There are three very important things to keep in mind here: Kitty Insert fabric - a non-stretch, cozy, washable fabric (more info on fabric choice in the Kitty Insert drafting section!)