precise figure adjustment

Given a graph, as in the example below, I need all of them to have the same size, for example, 7 cm horizontally and 4 cm vertically. Is there a command to standardize the entire graph?

I have to follow certain dimensions that Maple usually does not show when adjusting the graph size with the mouse.

with(plots);

NMC := [0, ln(2)], [6, ln(2)];
plot([NMC], color = black);

Thank you so much!