Do you keep our company's carton box at your company? If you do, I would like to confirm which size you keep, so could you please measure and report the size (height, length, and width) of the assembled box?
Do you store our company's carton box at yours? If so, I would like to check which box is stored, would you measure the assembled box size (horizontal and vertical size, and height)?
Have you kept our carton boxes in your office? If so, please take a measurement of the hight, width and depth of the box after making up, as we want to know which type of box you have got.
Is our carton box stored in your company's office? If so, please measure the size (width, length, height) of the composed box for us to affirm which size of the boxes are stored.