diff --git a/schemas/manifest_theme.json b/schemas/manifest_theme.json
index f825c4a..fd6b02a 100644
--- a/schemas/manifest_theme.json
+++ b/schemas/manifest_theme.json
@@ -7,6 +7,7 @@
     { "fileMatch": ["config/settings_schema.json"], "uri": "theme/theme_settings.json" },
     { "fileMatch": ["sections/*.liquid"], "uri": "theme/section.json" },
     { "uri": "theme/settings.json" },
+    { "uri": "theme/strict_settings.json" },
     { "uri": "theme/setting.json" },
     { "uri": "theme/default_setting_values.json" },
     { "uri": "theme/app_block_entry.json" },
diff --git a/schemas/theme/local_block_entry.json b/schemas/theme/local_block_entry.json
index 486d64b..0289ca4 100644
--- a/schemas/theme/local_block_entry.json
+++ b/schemas/theme/local_block_entry.json
@@ -19,7 +19,7 @@
       "description": "The number of blocks of this type that can be used."
     },
     "settings": {
-      "$ref": "./settings.json"
+      "$ref": "./strict_settings.json"
     }
   }
 }
diff --git a/schemas/theme/section.json b/schemas/theme/section.json
index 4036c80..89cad69 100644
--- a/schemas/theme/section.json
+++ b/schemas/theme/section.json
@@ -32,7 +32,7 @@
     },
 
     "settings": {
-      "$ref": "./settings.json"
+      "$ref": "./strict_settings.json"
     },
 
     "max_blocks": {
diff --git a/schemas/theme/strict_settings.json b/schemas/theme/strict_settings.json
new file mode 100644
index 0000000..b6ba47a
--- /dev/null
+++ b/schemas/theme/strict_settings.json
@@ -0,0 +1,24 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "$comment": "Settings for sections and blocks, which have stricter limits than config/settings_schema.json.",
+  "allOf": [
+    { "$ref": "./settings.json" },
+    {
+      "items": {
+        "properties": {
+          "options": {
+            "items": {
+              "properties": {
+                "value": {
+                  "$comment": "We skip t: values here because translation references don't have a length limit.",
+                  "if": { "pattern": "^t:" },
+                  "else": { "maxLength": 50 }
+                }
+              }
+            }
+          }
+        }
+      }
+    }
+  ]
+}
diff --git a/schemas/theme/theme_block.json b/schemas/theme/theme_block.json
index 0cb2fa5..e6f19a3 100644
--- a/schemas/theme/theme_block.json
+++ b/schemas/theme/theme_block.json
@@ -11,7 +11,7 @@
     },
 
     "settings": {
-      "$ref": "./settings.json"
+      "$ref": "./strict_settings.json"
     },
 
     "blocks": {
diff --git a/tests/setting.spec.ts b/tests/setting.spec.ts
index c16e460..c920280 100644
--- a/tests/setting.spec.ts
+++ b/tests/setting.spec.ts
@@ -8,10 +8,11 @@ const UNSUPPORTED_ICON_MESSAGE =
 const RADIO_ICON_MESSAGE =
   'The property icon is not allowed on radio options. Use a select setting for options with icons.';
 const NOT_DIVISIBLE_MESSAGE = 'Value is not divisible by 0.1.';
+const TOO_LONG_MESSAGE = 'String is longer than the maximum length of 50.';
 
 const sectionSchema = (setting: any) => ({ name: 'Test', settings: [setting] });
 
-describe('JSON Schema validation of setting option icons and number bounds', () => {
+describe('JSON Schema validation of setting options and number bounds', () => {
   describe('Unit: select options', () => {
     it('accepts a select option with a supported icon', async () => {
       const diagnostics = await validate(
@@ -76,6 +77,133 @@ describe('JSON Schema validation of setting option icons and number bounds', ()
     });
   });
 
+  describe('Unit: option value length', () => {
+    it('accepts a select option value of 50 characters', async () => {
+      const diagnostics = await validate(
+        'sections/section.liquid',
+        sectionSchema({
+          type: 'select',
+          id: 'variant',
+          label: 'Variant',
+          options: [{ value: 'a'.repeat(50), label: 'Long' }],
+        }),
+      );
+
+      expect(diagnostics).toStrictEqual([]);
+    });
+
+    it('rejects a select option value of 51 characters', async () => {
+      const diagnostics = await validate(
+        'sections/section.liquid',
+        sectionSchema({
+          type: 'select',
+          id: 'variant',
+          label: 'Variant',
+          options: [{ value: 'a'.repeat(51), label: 'Long' }],
+        }),
+      );
+
+      expect(diagnostics).toStrictEqual([expect.objectContaining({ message: TOO_LONG_MESSAGE })]);
+    });
+
+    it('accepts an empty select option value', async () => {
+      const diagnostics = await validate(
+        'sections/section.liquid',
+        sectionSchema({
+          type: 'select',
+          id: 'variant',
+          label: 'Variant',
+          options: [{ value: '', label: 'None' }],
+        }),
+      );
+
+      expect(diagnostics).toStrictEqual([]);
+    });
+
+    it('accepts a select option value over 50 characters that starts with t:', async () => {
+      const diagnostics = await validate(
+        'sections/section.liquid',
+        sectionSchema({
+          type: 'select',
+          id: 'variant',
+          label: 'Variant',
+          options: [{ value: `t:${'a'.repeat(60)}`, label: 'Long' }],
+        }),
+      );
+
+      expect(diagnostics).toStrictEqual([]);
+    });
+
+    it('rejects a radio option value of 51 characters', async () => {
+      const diagnostics = await validate(
+        'sections/section.liquid',
+        sectionSchema({
+          type: 'radio',
+          id: 'variant',
+          label: 'Variant',
+          options: [{ value: 'a'.repeat(51), label: 'Long' }],
+        }),
+      );
+
+      expect(diagnostics).toStrictEqual([expect.objectContaining({ message: TOO_LONG_MESSAGE })]);
+    });
+
+    it('rejects a select option value of 51 characters in a section-local block', async () => {
+      const diagnostics = await validate('sections/section.liquid', {
+        name: 'Test',
+        blocks: [
+          {
+            type: 'item',
+            name: 'Item',
+            settings: [
+              {
+                type: 'select',
+                id: 'variant',
+                label: 'Variant',
+                options: [{ value: 'a'.repeat(51), label: 'Long' }],
+              },
+            ],
+          },
+        ],
+      });
+
+      expect(diagnostics).toStrictEqual([expect.objectContaining({ message: TOO_LONG_MESSAGE })]);
+    });
+
+    it('rejects a select option value of 51 characters in a theme block', async () => {
+      const diagnostics = await validate(
+        'blocks/block.liquid',
+        sectionSchema({
+          type: 'select',
+          id: 'variant',
+          label: 'Variant',
+          options: [{ value: 'a'.repeat(51), label: 'Long' }],
+        }),
+      );
+
+      expect(diagnostics).toStrictEqual([expect.objectContaining({ message: TOO_LONG_MESSAGE })]);
+    });
+
+    it('accepts a number option value written with more than 50 characters', async () => {
+      const diagnostics = await validate(
+        'sections/section.liquid',
+        `{
+          "name": "Test",
+          "settings": [
+            {
+              "type": "number",
+              "id": "width",
+              "label": "Width",
+              "options": [{ "value": ${'1'.repeat(51)}, "label": "Huge" }]
+            }
+          ]
+        }`,
+      );
+
+      expect(diagnostics).toStrictEqual([]);
+    });
+  });
+
   describe('Unit: number settings', () => {
     it('accepts a number setting with min, max, icon, and options', async () => {
       const diagnostics = await validate(
diff --git a/tests/theme-settings/setting_options.spec.ts b/tests/theme-settings/setting_options.spec.ts
index eae258a..4b2edb2 100644
--- a/tests/theme-settings/setting_options.spec.ts
+++ b/tests/theme-settings/setting_options.spec.ts
@@ -122,4 +122,26 @@ describe('Module: theme settings validation (config/settings_schema.json)', () =
       ]);
     });
   });
+
+  describe('Unit: option value length', () => {
+    it('select setting allows an option value over 50 characters', async () => {
+      const settings = `[
+        {
+          "name": "some category",
+          "settings": [
+            {
+              "type": "select",
+              "id": "variant",
+              "label": "Variant",
+              "options": [{ "value": "${'a'.repeat(51)}", "label": "Long" }]
+            }
+          ]
+        }
+      ]`;
+
+      const diagnostics = await validate('config/settings_schema.json', settings);
+
+      expect(diagnostics).toHaveLength(0);
+    });
+  });
 });