Fits In The Box

Turn shipping into upsells. Show what else fits in the...

by Swagstack · Launched: March 2026

0.0 on Shopify Built for Shopify

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Show shoppers what else fits in their current box. They add more items, you sell more.

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About Fits In The Box

Fits In The Box uses a 3D packing engine to show customers exactly what else fits in their current shipment. It helps merchants build bigger orders by giving shoppers a reason to add one more item. The app installs in minutes, works with your existing products and shipping rates, and handles complex scenarios like multi-box orders and cold chain requirements automatically. Real-time 3D packing calculates remaining box space as shoppers browse Smart upsell suggestions highlight products that ship with no added weight Works out of the box—just enter your box sizes and shipping rates Multi-box logic splits large orders across boxes for accurate shipping Cold chain support keeps frozen and ambient items separate Show more Show less

Last verified: July 21, 2026 · Fresh