Multiple box sizes is a Pro feature. Upgrade to BoxBuilder Pro →
Setting Up Sizes
Size Display Settings
Configure size display in BoxBuilder → Settings → Cart under Box Sizes:Size Display Style
| Style | Description |
|---|---|
| Cards (dropdown on mobile) | Visual cards showing label, capacity, and price — automatically switches to dropdown on small screens (default) |
| Dropdown selector | A compact dropdown menu — useful when you have many size options |
Size Change Behavior
When a customer changes their size after already adding items to the box, you can control what happens:| Behavior | Description |
|---|---|
| Keep items that fit, remove excess | Items that still fit the new capacity are kept; excess items are removed (default) |
| Prevent size change | Block size changes when items exceed the new capacity |
| Show warning and ask to confirm | Display a confirmation dialog before changing |
Example Configuration
| Size | Capacity | Price |
|---|---|---|
| Small | 6 items | $19.99 |
| Medium | 12 items | $34.99 |
| Large | 24 items | $59.99 |
| Party Box | 48 items | $99.99 |
How Sizes Work with Pricing
| Pricing Model | Size Price Behavior |
|---|---|
| Fixed | Each size has its own fixed price |
| Per-Item | Size has no price — total is sum of items |
| Hybrid | Each size has a base price + per-item prices |