Questions about Box Dimensions and Weight?

[carl_ivory]

From what I understand, the dimesions printed on the outside of the box are the inside dimensions, so I should add 1 inch to each dimension when listing my item? I've seen people on youtube give tutorials and they never mention this and just put the dimensions that were on the box. If I have a 4 x 4 x 4 box. I should list it as 5 x 5 x 5, correct?

As for the weight, I know you should round up to the nearest pound. Should I add an extra 1 pound for the box and packing? For example, here is an item I have that I want to list.

Weight of main item: 17.2 lb. = 18 lb.

Weight of all additional things that come with it: 4 lb. 8.1 oz. = 5 lb.

Box and packing: 1 lb.

Total: 24 lb.

Is it a good rule of thumb to just add a pound for the box and packing? I heard someone else say to add 6 oz.

[lesegouts]

One of my many roles at my company (me and one other employee) is I do all the shipping. Usually it goes like this:

10x8x6 =  10x9x7

14x12x8 = 14x13x9

The longest measurement I leave the same and add an inch to the other two dimensions. I do not have rebills from UPS.

I also vacuum, clean toilets, dust and just about anything you can think of. 50 years and still going...