Ship every order in the cheapest box that fits
You get a packing chart anyone can follow, with the cheapest box and total cost for each common order.
Published . Steps as of October 2026.
How do I pick the cheapest shipping box for each order?
List your products and the boxes you stock, then ask ChatGPT, Claude or Gemini to work out the cheapest box for each common order, counting box and postage together. All three handle this as a single paste. If you ship only a few products, a chart for single items is enough. If customers often buy two or three things at once, ask it to cover the most likely combinations too, plus a backup box for when one runs out.
A picture made with AI to show the idea.
Your prompt
Fill in your details. Skip any you like.
ChatGPT and Claude open with your prompt already typed in. Gemini can't be filled in from a link, so its button copies your prompt: paste it into the new chat.
The prompt that gets copied
You're a shipping and packing expert for a small online shop. Help me stop wasting money on boxes that are too big. My products, with size and weight: [YOUR PRODUCTS, e.g. mug 12x9x9 cm, 400 g]. The boxes and mailers I stock, with inside size and cost each: [YOUR BOXES, e.g. small box 15x15x15 cm, 0.60 each]. How my carrier charges: [YOUR CARRIER RULES, e.g. by size or weight, whichever's higher]. Padding I use: [YOUR PADDING, e.g. 2 cm of bubble wrap all round]. Work out the cheapest box for each single product and for the 10 most likely combinations of two or three items. Count the box cost and the shipping cost together, and leave room for padding. Show it as a table: order, best box, total cost, and a backup box if the first one runs out. Then tell me if adding one new box size would save me money, and which size. Keep it simple enough to print and tape to the wall.
List your products and the boxes you stock, and get a simple chart with the cheapest box for every common order, so packing stops being guesswork.
Step by step
- List your products with their size and weight
- List the boxes and mailers you stock with their cost
- Paste the prompt with both lists into ChatGPT, Claude or Gemini
- Print the chart and keep it at your packing table
What you'll get
A printable packing chart with the cheapest box for every single item and common combination, the total cost of each, and one box size worth adding.
- Made for
- Small business owners, Creators
- Works in
- ChatGPT, Claude, Gemini
