Here are two examples of more formal, dressier style shirts. Notice the interfacing is on the inner collar band. Notice also that the outer band has a lot of ‘ease’ built in. That helps the band wrap around the neck.
TOOLS
Freezer Paper
The best pattern paper. Iron on a wool setting and it sticks to fabric. Reusable, durable, and transparent enough for tracing.
Tracing Wheel
Spokes aren't too sharp and it works well to trace a temporary line on fabric or paper.
Wavy Rotary Blade
Use in place of pinking shears, quickly trim outside edges of circles.
Do you have tips for stitching the rounded style (at CF) band? I used the "Classic" shirt band pattern piece and will try your squared-off style next time. Thinking it will be easier to get those seams to fold up and in, and edgestitch.
It definitely easier to stitch the squares off style, but for top stitch the round, I recommend drawing the top stitch line with a frixtion marker and following that. I also use an edge stitch foot, but that takes a little practice. Grab a piece of card stock or an index card, cut it to match the round shape, and practice stitching. Check stitch length (adjust smaller around curves), and otherwise audition the top stitching. It can also help to use a smaller needle. Sounds opposite, but it gives more precision.