Products
3 min to readLast update on 14 September 2026

How to Set Up Price in Product Sizes?

Size-based pricing lets you add an extra charge on top of the product base price for specific sizes. For example, if the base price is $20 and you want $22 for XXL, put 2.00 in Extra Price ($) for that size.

Larger sizes often cost more to print or ship. This keeps the base price fair, and you are not undercharging the sizes that cost more.

What is size-based pricing?

Each size in a size set can have its own Extra Price ($). When a shopper chooses that size in SIZE & QUANTITY, Custy adds that amount on top of the product base price for each piece of that size.

Step 1: Open Products

In Custy, click Products on the left. This is your store product list.

Custy Products page with Products in the left menu and the product listFull size
Click Products on the left to open your store product list.
  1. 1

    Products (left menu)

    Opens the product list for this store.

  2. 2

    Products tab

    Stay on this tab (not Create Colors or Product Size) to see the catalog.

  3. 3

    Product list

    Synced Shopify products. Search or filter if the list is long.

Step 2: Find and edit the product

Find the product you want to update. Click Edit. If it is not customizable yet, click Make it customizable first.

  • Use Search products or the All / Custom filters if you need to.
  • On a customizable product, click Edit.
  • On a standard product, click Make it customizable first, then continue with Product Sizes.
Products list with Edit on a customizable product and Make it customizable on a standard productFull size
Click Edit on a custom product, or Make it customizable if it is still standard.
  1. 1

    Search products

    Type part of the product name to find it faster.

  2. 2

    Edit

    Opens Customize Product for a product that is already customizable.

  3. 3

    Make it customizable

    Use this first if the product still says Standard. If you hit your plan limit, you will see Upgrade Plan instead.

Step 3: Open Product Sizes

On Customize Product, Product Sizes sits near the top, just under the product title block. You will see the size category tabs and the Size Set currently assigned.

Badges under the dropdown

If a size already has an extra, the badge shows it as +$X.XX next to the size title.

Customize Product Product Sizes section with Size Set dropdown and Edit SetFull size
Confirm the size set, then click Edit Set to change extra prices.
  1. 1

    Category tabs

    Adult Sizes, Open Sizes, and Youth Sizes. Pick the group that matches the product.

  2. 2

    Size Set

    The list this product uses. Extra prices live inside this set.

  3. 3

    Edit Set

    Opens Edit Size Set so you can change Extra Price ($). Use + New Size Set if you still need a set.

Step 4: Open the size set

Click Edit Set next to the assigned size set. The Edit Size Set window opens with every size in that set.

  • If you do not have a set yet, click + New Size Set, add Size Title rows, then save.
  • You can also edit from ProductsProduct Size with the pencil on a set.

Step 5: Set Extra Price ($) for each size

In the size set window, each size has Size Title and Extra Price ($).

  1. 1Extra Price ($): enter the additional amount for that size. It is added on top of the product base price for each piece the shopper orders in that size.
  2. 2You can set a different extra on each size, or leave 0.00 on sizes with no extra charge.
Edit Size Set window with Extra Price field on each sizeFull size
Enter Extra Price ($) only on sizes that cost more, then click Update.
  1. 1

    Size Set Name

    Confirms which size list you are editing.

  2. 2

    Extra Price ($)

    Add-on for that size. Use 0.00 if the base product price is enough.

  3. 3

    Update

    Saves the prices. On a new set, this button says Save.

Step 6: Save your changes

Click Update (or Save on a new set). The extra applies automatically when a shopper picks that size in the Design Lab.

What shoppers see

In the Design Lab, shoppers click SELECT SIZE & QUANTITY. Next to a size with an extra, they see +$X.XX. That amount is included when they add the design to the cart.

Design Lab SIZE and QUANTITY window with extra price next to a sizeFull size
Shoppers see the extra next to the size when they choose quantity.
  1. 1

    SELECT SIZE & QUANTITY

    Opens the size and quantity step.

  2. 2

    Size extra

    Shown as +$ next to the size title when Extra Price ($) is greater than 0.

  3. 3

    ADD TO CART

    The cart total includes the size extra for each piece of that size.

What to do next

If some colors also cost more, set Price ($) on those colors. Then finish printing types if you still need printing fees.