Recently I've realized a good amount of people probably don't know the formulas needed to get a hollow fuselage's shell thickness to equal a specific width so here you go.

For fuselages with a width and height equal to or greater than 1:
desired thickness * 5

For fuselages with a width or height lower than 1:
desired thickness * 5) / lowest fuselage dimension

lmk if I should clarify or rephrase

To get the width of a fuselage thickness to fuselage increments use
fuselage thickness / 5) * lowest fuselage dimension