Sizes in the Simple Letter Model are based on your size strategy: fixed width or fixed height combined with the maximum characters per line and maximum number of lines allowed for each size.
Step 1: Create a New Size
Go to the Sign Customiser Admin:
Universal subscribers: Go to Home in your account.
Shopify users: Navigate to Shopify admin → Apps and select Sign Customiser.
Click on Customisers in the menu.
Select the customiser you want to edit.
From the left-hand menu, go to Sizes.
In the Size section, click Add new size or edit an existing one.
In the Size Details section, add:
Label - title for your size (e.g. Small, 50cm)
(Optional) Description - extra details describing your size
In the Size Strategy section, choose one:
Fixed Width - define your width size. Height scales dynamically.
Fixed Height - define height per line size. Width scales dynamically.
In the Lines of text section, assign the maximum number of lines allowed.
In the Minimum and Maximum characters allowed for this size section, set:
Minimum Text Characters - minimum characters for the entire sign.
Maximum Text Characters per line - The maximum allowed per line.
Click the Save.
Continue adding other sizing as needed, then proceed to the next step.
Step 2: Automatically Switch to the Next Size When Character Limit Is Reached
Since you can set a maximum character limit per size in the Simple Letter Model, you can choose to allow the app to automatically switch to the next size when a customer enters more characters than the limit allows. This ensures the users can design their sign freely without being interrupted by character limits.
By default, this automatic size switching is enabled.
To Disable Automatic Size Switching:
From the left-hand menu in your customiser, go to Sizes.
In the Character limits section, toggle Prevent size automatically switching up to disable this feature.
Click Save.
Step 3: Create a Pricing Plan for Your Sizes
From the left-hand menu in your customiser, go to Pricing.
Click on the Add new pricing or edit an existing one.
Under the Price Settings section, give your pricing a title in the Label field (for internal use only).
In the Pricing for each size section, all the available sizes you created in Step 1 will be visible here.
Configure your pricing for each size:
(Optional) Base Price - the cost for each line of text on the sign. You can set different base prices for the first, second line, third lines, etc.
Note: if you have Multiple Fonts option enabled, this setup will look a little. See Multiple Fonts guide for further details.
(Optional) Letter Price - cost per character based on the number of lines. Set both the base price and letter price for each line. If not needed, enter '0'.
Click Save.
Want to know how pricing works in the Simple Letter Model?
For full examples and a detailed explanation, see How Pricing Works in the Simple Letter Model.
Step 4: Add and Assign Fonts to Your Pricing
From the left-hand menu in your customiser, go to Fonts.
Click on the Add new font or edit an existing one.
In the Label field, enter the font name.
In the Font section, choose one:
Add file - to upload a .ttf font file.
Use Google Font - select a font from Google Fonts.
In the Assign a pricing section, select the pricing rule created in Step 2 for that font.
Note: you can have multiple pricing rules and assign them to different fonts.In the Font Size Availability section, choose whether this font should be restricted from a certain size.
In the Font Style section, you can adjust the spacing between each new line or leave it as default.
Click Save.
These are the core steps to help you get started with the Simple Letter Model.
You can continue configuring additional features such as Backboard, Mounting and more. See our Features section for further setup guides.
Best Practices: How to Best Utilize the Simple Letter Model Effectively
Organising Your Fonts
Organising your fonts into clear groups helps you manage pricing tiers more efficient. Each group will determine how expensive each line and price per letter should be for the font in that category.
1. Align Font Height in Adobe Illustrator
Add all the fonts you plan to use in a single Adobe Illustrator (or similar program) file and make sure their font heights are the same. This gives you a clear comparison between fonts. You will end up with a result like this:
2. Group Fonts By Width
Thinner or narrower fonts tend to produce taller signs in the Simple Letter Model, resulting in a sign that may require more material. Using the illustrator file above, group these fonts separately and assign them to higher pricing tiers in your app.
3. Test and Measure Maximum Heights
Refer back to your shipping cost matrix, for each width in your shipping cost matrix. To determine the max height that could be produced for that given width, use Illustrator to test each font by:
Adding a certain number of lines (e.g three lines) of text (this should be the same for each width size you test).
Set a line height
Adjusting text size to match the width you are testing, e.g. 60cm.
You will now have the maximum height for each font for the chosen width.
4. Determine Your Pricing Tiers
Based on your tests, assign each font group to a pricing tier according to its maximum height. Fonts that create taller signs should belong to higher pricing tiers in your app.
Additional Tips
Experiment with font and character settings. Try different font combinations and min/max character limits per size to find what works best within your defined size boundaries. In some cases, switching to another font may yield better results.
Limit certain fonts so they are only available only for larger sizes, where they are most suitable.