diff --git a/packages/iconify/src/render/bg.ts b/packages/iconify/src/render/bg.ts
index e678c5c..da4a1e1 100644
--- a/packages/iconify/src/render/bg.ts
+++ b/packages/iconify/src/render/bg.ts
@@ -41,6 +41,13 @@ for (const prefix in propsToAddTo) {
 	}
 }
 
+/**
+ * Fix size: add 'px' to numbers
+ */
+function fixSize(value: string): string {
+	return value + (value.match(/^[-0-9.]+$/) ? 'px' : '');
+}
+
 /**
  * Render icon as inline SVG
  */
@@ -78,8 +85,8 @@ export function renderBackground(
 	const url = svgToURL(html);
 	const newStyles: Record<string, string> = {
 		'--svg': url,
-		'width': renderAttribs.width,
-		'height': renderAttribs.height,
+		'width': fixSize(renderAttribs.width),
+		'height': fixSize(renderAttribs.height),
 		...commonProps,
 		...(useMask ? monotoneProps : coloredProps),
 	};
diff --git a/packages/iconify/tests/render-bg-test.ts b/packages/iconify/tests/render-bg-test.ts
index d72fcea..39bfd83 100644
--- a/packages/iconify/tests/render-bg-test.ts
+++ b/packages/iconify/tests/render-bg-test.ts
@@ -167,4 +167,16 @@ describe('Testing rendering nodes as background', () => {
 		expect(data.addedClasses).toEqual(['iconify--test']);
 		expect(data.addedStyles).toEqual([...expectedBackgroundStyles]);
 	});
+
+	it('Custom dimensions', async () => {
+		await testIcon(
+			'<span class="iconify" data-icon="mdi:home" data-width="auto" data-height="48"></span>',
+			{
+				body: '<g />',
+				width: 24,
+				height: 24,
+			},
+			`<span class="iconify iconify--mdi" data-icon="mdi:home" data-width="auto" data-height="48" style="--svg: url(&quot;data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24'%3E%3Cg /%3E%3C/svg%3E&quot;); width: 24px; height: 48px; display: inline-block; background-color: transparent; background-repeat: no-repeat; background-size: 100% 100%;"></span>`
+		);
+	});
 });
diff --git a/packages/react/src/render.ts b/packages/react/src/render.ts
index cfa8f40..60fabf0 100644
--- a/packages/react/src/render.ts
+++ b/packages/react/src/render.ts
@@ -62,6 +62,13 @@ for (const prefix in propsToAddTo) {
  */
 const inlineDefaults: FullIconCustomisations = { ...defaults, inline: true };
 
+/**
+ * Fix size: add 'px' to numbers
+ */
+function fixSize(value: string): string {
+	return value + (value.match(/^[-0-9.]+$/) ? 'px' : '');
+}
+
 /**
  * Render icon
  */
@@ -216,8 +223,8 @@ export const render = (
 	componentProps.style = {
 		...style,
 		'--svg': svgToURL(html),
-		'width': renderAttribs.width,
-		'height': renderAttribs.height,
+		'width': fixSize(renderAttribs.width),
+		'height': fixSize(renderAttribs.height),
 		...commonProps,
 		...(useMask ? monotoneProps : coloredProps),
 		...customStyle,
diff --git a/packages/react/tests/iconify/10-style-mode.test.js b/packages/react/tests/iconify/10-style-mode.test.js
index f51e424..45fb1ad 100644
--- a/packages/react/tests/iconify/10-style-mode.test.js
+++ b/packages/react/tests/iconify/10-style-mode.test.js
@@ -42,4 +42,40 @@ describe('Rendering as span', () => {
 			children: null,
 		});
 	});
+
+	test('custom dimensions', () => {
+		const component = renderer.create(
+			<Icon
+				icon={iconData}
+				mode="style"
+				width="32"
+				height={48}
+				onLoad={() => {
+					// Should be called only for icons loaded from API
+					throw new Error('onLoad called for object!');
+				}}
+			/>
+		);
+		const tree = component.toJSON();
+
+		expect(tree).toMatchObject({
+			type: 'span',
+			props: {
+				style: {
+					'--svg': `url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24'%3E%3Cpath d='M4 19h16v2H4zm5-4h11v2H9zm-5-4h16v2H4zm0-8h16v2H4zm5 4h11v2H9z' fill='currentColor'/%3E%3C/svg%3E")`,
+					'width': '32px',
+					'height': '48px',
+					'display': 'inline-block',
+					'backgroundColor': 'currentColor',
+					'webkitMaskImage': 'var(--svg)',
+					'webkitMaskRepeat': 'no-repeat',
+					'webkitMaskSize': '100% 100%',
+					'maskImage': 'var(--svg)',
+					'maskRepeat': 'no-repeat',
+					'maskSize': '100% 100%',
+				},
+			},
+			children: null,
+		});
+	});
 });
diff --git a/packages/svelte/src/render.ts b/packages/svelte/src/render.ts
index 231ebdb..a190e01 100644
--- a/packages/svelte/src/render.ts
+++ b/packages/svelte/src/render.ts
@@ -54,6 +54,13 @@ for (const prefix in propsToAddTo) {
 	}
 }
 
+/**
+ * Fix size: add 'px' to numbers
+ */
+function fixSize(value: string): string {
+	return value + (value.match(/^[-0-9.]+$/) ? 'px' : '');
+}
+
 /**
  * Result
  */
@@ -217,8 +224,8 @@ export function render(
 	const url = svgToURL(html);
 	const styles: Record<string, string> = {
 		'--svg': url,
-		'width': renderAttribs.width,
-		'height': renderAttribs.height,
+		'width': fixSize(renderAttribs.width),
+		'height': fixSize(renderAttribs.height),
 		...commonProps,
 		...(useMask ? monotoneProps : coloredProps),
 	};
diff --git a/packages/svelte/tests/iconify/10-style-mode.test.ts b/packages/svelte/tests/iconify/10-style-mode.test.ts
index 91f932f..c716c7e 100644
--- a/packages/svelte/tests/iconify/10-style-mode.test.ts
+++ b/packages/svelte/tests/iconify/10-style-mode.test.ts
@@ -32,4 +32,28 @@ describe('Rendering as span', () => {
 			"<span style=\"--svg: url(&quot;data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24'%3E%3Cpath d='M4 19h16v2H4zm5-4h11v2H9zm-5-4h16v2H4zm0-8h16v2H4zm5 4h11v2H9z' fill='currentColor'/%3E%3C/svg%3E&quot;); width: 1em; height: 1em; display: inline-block; background-color: currentColor; mask-image: var(--svg); mask-repeat: no-repeat; mask-size: 100% 100%;\"></span>"
 		);
 	});
+
+	test('custom dimensions', () => {
+		const component = render(Icon, {
+			icon: iconData,
+			mode: 'style',
+			width: '48',
+			height: 32,
+			onLoad: () => {
+				// Should be called only for icons loaded from API
+				throw new Error('onLoad called for object!');
+			},
+		});
+		const node = component.container.querySelector(
+			'span'
+		) as HTMLSpanElement;
+		expect(node).not.toBeNull();
+		expect(node.parentNode).not.toBeNull();
+		const html = node.outerHTML;
+
+		// Check HTML
+		expect(html).toBe(
+			"<span style=\"--svg: url(&quot;data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24'%3E%3Cpath d='M4 19h16v2H4zm5-4h11v2H9zm-5-4h16v2H4zm0-8h16v2H4zm5 4h11v2H9z' fill='currentColor'/%3E%3C/svg%3E&quot;); width: 48px; height: 32px; display: inline-block; background-color: currentColor; mask-image: var(--svg); mask-repeat: no-repeat; mask-size: 100% 100%;\"></span>"
+		);
+	});
 });
diff --git a/packages/vue/src/render.ts b/packages/vue/src/render.ts
index aead9b1..21c889a 100644
--- a/packages/vue/src/render.ts
+++ b/packages/vue/src/render.ts
@@ -83,6 +83,13 @@ const customisationAliases: Record<string, string> = {};
  */
 type VStyle = Record<string, unknown>;
 
+/**
+ * Fix size: add 'px' to numbers
+ */
+function fixSize(value: string): string {
+	return value + (value.match(/^[-0-9.]+$/) ? 'px' : '');
+}
+
 /**
  * Render icon
  */
@@ -232,8 +239,8 @@ export const render = (
 	componentProps.style = {
 		...style,
 		'--svg': svgToURL(html),
-		'width': renderAttribs.width,
-		'height': renderAttribs.height,
+		'width': fixSize(renderAttribs.width),
+		'height': fixSize(renderAttribs.height),
 		...commonProps,
 		...(useMask ? monotoneProps : coloredProps),
 		...customStyle,