Sometimes you have the perfect design, but your material at hand is thinner or thicker than what the design was created for.
You can see what needs to be measured - the slots in the design.
You know the adjustment needed - design to material, e.g. 1.25mm to 1.75mm, etc.
But you’re stuck scaling the whole design up a little, cutting, re-scaling, cutting, rinse, repeat, throw more money in materials than you ever imagined it would take.
A high resolution measuring tool. It’s going to be targeted for distances of the thickness of the materials being cut, e.g. 0.5mm to ~8mm.
Bonus if one end of the measuring tool snapped to one of the lines, so scaling the design doesn’t require repositioning the measuring tool each time.
Double bonus if the measuring tool snapped to two lines
Rockstar status if the measuring tool is a scaling tool. - typing in the desired distance caused the whole design to scale the appropriate (uniform) amount.