# Configure Your Simple Letter Model Customiser (Core Setup)
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.
- Source URL: https://www.signcustomiser.com/help/pricing-and-sizing/configure-your-simple-letter-model-customiser-core-setup/
- Markdown URL: https://www.signcustomiser.com/help/pricing-and-sizing/configure-your-simple-letter-model-customiser-core-setup.md
- Category: Pricing and Sizing Models
- Last updated: 2025-12-12
## Article
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
1. 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**.
2. Click on **Customisers** in the menu.
3. Select the **customiser** you want to edit.
4. From the left-hand menu, go to **Sizes**.
5. In the **Size** section, click **Add new size** or edit an existing one.
6. In the **Size Details** section, add:
- **Label** - title for your size (e.g. Small, 50cm)
- (_Optional_) **Description** - extra details describing your size
7. 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.
8. In the **Lines of text** section, assign the maximum number of lines allowed.
9. 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.
10. 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:
1. From the left-hand menu in your customiser, go to **Sizes**.
2. In the **Character limits** section, toggle **Prevent size automatically switching up** to disable this feature.
3. Click **Save**.
## Step 3: Create a Pricing Plan for Your Sizes
1. From the left-hand menu in your customiser, go to **Pricing**.
2. Click on the **Add new pricing** or edit an existing one.
3. Under the **Price Settings** section, give your pricing a title in the **Label** field (_for internal use only_).
4. In the **Pricing for each size** section, all the available sizes you created in [Step 1](../../pricing-and-sizing/configure-your-simple-letter-model-customiser-core-setup/) 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.](../../features/multi-color-multi-font-sign-designs/)
- (_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'.
5. Click **Save**.
## Step 4: Add and Assign Fonts to Your Pricing
1. From the left-hand menu in your customiser, go to **Fonts**.
2. Click on the **Add new font** or edit an existing one.
3. In the **Label** field, enter the font name.
4. In the **Font** section, choose one:
- Add file - to upload a .ttf font file.
- Use Google Font - select a font from Google Fonts.
5. In the **Assign a pricing** section, select the pricing rule created in [Step 2](../../pricing-and-sizing/configure-your-simple-letter-model-customiser-core-setup/) for that font.
**Note:** you can have multiple pricing rules and assign them to different fonts.
6. In the **Font Size Availability** section, choose whether this font should be restricted from a certain size.
7. In the **Font Style** section, you can adjust the spacing between each new line or leave it as default.
8. 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:
[](/help/intercom-docs/help-centre-images/f021bdcc28c9f5ca4faa97dffb90ade7838c4aa9c068c15aaac305cb09f823bb.png)
#### **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](../../pricing-and-sizing/configure-your-simple-letter-model-customiser-core-setup/), 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.