Please help about blue lines on solid objects

Hey all, im quite new to sketchup. I have been modeling some wood and when i create solid object, i get blue lines around it, and it is almost allways out of angle and when i am using cutlist extension, the width of these blue lines appears as the actual width of the object. For example, wood in the picture is 50mm thick, and my cutlist thinks it is 110mm because of those blue lines. Is there any way to fix them or turn them off?

right click the item and select “Change axis” from the menu, sometime you must have edited, or perhaps created skew, or off axis.
reposition axis along the sides you require

It worked, thanks for quick reply !