What style and size stitching chisels/pricking irons for starting?

[Moyerbros]

Howdy all.

I’m starting to collect some tools as I begin my journey into this craft and I’m currently trying to figure out what style and size pricking iron/stitching chisel to get. I was leaning towards getting both a 4mm and a 3mm set to start to cover my bases, but what are your recommendations?
 

Any reason to get a French style over a diamond? I’ve been looking at particularly Kevin Lee tools as the reviews are great and the price is very nice https://kevinleathertools.com/products/kl-basic-upgrade-pricking-iron?VariantsId=10715

https://kevinleathertools.com/products/upgrade-basic-diamond-iron?VariantsId=11398

 

For context, my goal is to try to make some belts, knife sheaths, and holsters eventually. For now, I’m planning on trying some smaller projects as well such as valet trays, wallets, and dog collars. 
 

Thanks! 

[tsunkasapa]

I have never felt the need for 'irons' in the decades I've been doing this. I have several marker wheels, 5-10 stitches per inch, and several sizes of awls. It is far faster and a lot easier.

Edited 1 hour ago by tsunkasapa