# Sizing - Advanced model
This guide explains how to configure Sizes for the Advanced letter Model. Sizes in this model are based on a Scale Multiplier that dynamically adjusts the sign's dimensions according to the selected font. This section covers everything you need to configure within the Sizes settings in the Advanced Letter Model.
- Source URL: https://www.signcustomiser.com/help/pricing-and-sizing/sizing-advanced-model/
- Markdown URL: https://www.signcustomiser.com/help/pricing-and-sizing/sizing-advanced-model.md
- Category: Pricing and Sizing Models
- Last updated: 2026-04-02
## Article
This guide explains how to configure **Sizes** for the **Advanced letter Model**. Sizes in this model are based on a **Scale Multiplier** that dynamically adjusts the sign's dimensions according to the selected font.
This section covers everything you need to configure within the **Sizes** settings in the **Advanced Letter Model**.
## Accessing the Sizes Settings
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 your **customiser**.
4. From the left-hand menu, go to **Core Setup**.
5. Click **Sizes**.
## Step 1: Create a New Size (Scale Multiplier)
In the **Advanced Letter Model**, each size is defined by a **Size Scale Multiplier**. This means that the sign scales proportionally according to the font's baseline letter height. The width is calculated automatically using the natural scaling of the height.
## Example
Assume the following font properties:
- Smallest lowercase letter height: **6 cm**
- Smallest uppercase letter height: **10 cm**
Defined sizes:
- Small - assigned multiplier: **1.0**
- Medium - assigned multiplier: **1.5**
### Scenario A
Customer enters **"e"** and selects the **Medium** size.
Result: 6 cm × 1.5 = **9 cm height**
### Scenario B:
Customer enters **"B"** and selects the **Small** size.
Result: 10 cm × 1.0 = **10 cm height**
### Scenario C:
Customer enters **"Hello"** and selects the **Small** size.
Result: 8 cm × 1.0 = **8 cm height**
## How the System Calculates Sign Dimensions
Let's break down how the sign "Hello" becomes 24 cm wide and 8 cm tall.
1. The system analyses all the characters in the sign and finds the letter with the smallest height in pixels. In this case, it is "o".
2. The letter o's pixel height is measured and compared to the cm value configured in the font settings.
With the "Hello" example:
If the "o" is approximately **28.85 px tall**, and your configured lowercase height is **6 cm**, then,
28.85 px = 6 cm
1 px ≈ 0.208 cm
3. This ratio is then used to convert the entire sign's pixel dimensions into centimetres.
If the full sign height measures **38.47 px**, then:
38.47 × (6 ÷ 28.85) = **8 cm**
For width, the same ratio applies:
115.4 px × (6 ÷ 28.85) = **24 cm**
## Create a Size
1. In the **Size** section, click **Add new size** (or edit an existing size).
2. Under **Size Details**, enter:
- **Label** – e.g. _Small_
- **Size Scale Multiplier** – e.g., 1.5
3. Click **Save**.
## Step 2: Add a Title and Description for the Sizes Section
The title and description entered here appear on the storefront.
1. While still in **Sizes**, scroll to **Language Settings**.
2. Enter:
- **Title** - section heading shown to customers
- **Description** (_optional_)
3. Click **Save.**
## Step 3: Enable Custom Sizing (Optional)
Custom Sizing allows customers to choose a size using a range slider rather than preset size options. You can either show the custom size input only after the customer selects the custom option, or show the custom size input immediately. If required for older customisers, you can also keep showing the legacy **Custom** button while the input is always visible.
1. While still in **Sizes**, scroll to **Custom Sizing**.
2. Choose one of the following:
- **Disable Custom Sizing** – prevents customers from setting a custom size.
- **Enable Custom Sizing** – allows customers to set a custom size for their sign.
If **Enable Custom Sizing** is selected, set:
- **Custom size label** – label shown above the custom size input, and on the button if the legacy button is enabled
- **Maximum Range (cm)** – maximum width allowed for custom size
- **When should the custom size input be shown?** – show the custom size input only when the **Custom** option is selected, or always show the custom size input.
- **Also show the Custom button (legacy)** – when the custom size input is set to always show, this optional toggle keeps the old layout by displaying the **Custom** button above the input. Only applies when preset sizes are also visible.
- **Hide the other sizes** – display all sizes or only the custom size.
3. Click **Save**.
## Step 4: Set Sign Size Limits
You can restrict the maximum width and height for a sign.
1. In **Sizes**, scroll to the **Size Settings** section.
2. Set **Maximum Sign Width**:
- **Unlimited width** – no restrictions (_if Custom Sizing is enabled, the slider maximum still applies_)
- **Width limit** – set a maximum allowed width.
3. Set **Maximum Sign Height:**
- **Unlimited height** – no restrictions.
- **Height limit** – set a maximum allowed height.
4. Click **Save**.
## Step 5: Set Character Limits
1. In **Sizes**, scroll to the **Character limits** section.
2. Set the minimum number of characters required for the sign in the **Minimum Text Characters** input field.
3. Click **Save**.
Once completed, the Size section of your **Advanced Letter Model** customiser is fully configured.
You can now proceed to **[Pricing](../../pricing-and-sizing/pricing-advanced-letter-model/)** and **[Fonts](../../pricing-and-sizing/fonts-advanced-model/)**.