Product ke liye sahi box size
As a grid: along the length × width × height.
Inside box size
220 × 170 × 100 mm
The ply comes from the packed weight only (3 ply to about 7 kg, 5 ply to about 20 kg, 7 ply above). It is not a strength calculation. For stacking and storage, use the ply guide.
Packing
Place each item 200 × 150 × 80 mm (length × width × height), 1 × 1 × 1 in the box.
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Inside size = product × grid + 2 × padding on each side, rounded up to the next mm. Outside adds the board: two walls on length and width, two flap layers on height. Everything you type stays in this browser.
Inside size = product size × number of items along that side + 2 × padding. Add the board thickness to get the outside size the courier measures.
About 5 mm for a snug fit (books, boxed goods), 10 mm as a standard allowance, and 25 mm or more for fragile items that need bubble wrap or foam around them.
Give the box maker the inside size; boxes are made to inside dimensions. Couriers bill on the outside size, which is a little bigger because of the board.
No. It is a rule of thumb from the packed weight. If boxes will be stacked or stored for long, use the ply guide, which estimates box strength.