Within the realm of "whittling," there are several distinctly different styles.
Most all can be done with a 3" folder but you get what you pay for.
My small blades which would do this are no more than 1" in length.
Flexcut and Moor are good brands. Flexcut is probably easier for you to find.
Honestly, I don't know of bladesmiths in this parish who regularly make such tools.
Lynn Doughty (USA) is a virtuoso and uses no more than a box-cutter.
The difference being the concept of what is called "carving sharp."
This isn't hair-shaving sharp. This is cut yourself very badly sharp.
If you must hold the wood, invest in a butcher's chain mail mesh glove.
Cut protection yes, stab protection, no. Same for Kevlar carving gloves.
Combo 1K/4k waterstone , some simple box card strop with CrOx/AlOx honing compound.
A good understanding of the needed 12 degree bevel angle and the learned ability to hold that.
You can put a good edge on a new razor blade.