diff --git a/packages/core/src/modern/index.ts b/packages/core/src/modern/index.ts
index 45f1727..2c7c519 100644
--- a/packages/core/src/modern/index.ts
+++ b/packages/core/src/modern/index.ts
@@ -4,6 +4,7 @@ import type { FullIconifyIcon } from '@iconify/utils/lib/icon';
 import { defaultCustomisations as DefaultIconCustomizations, iconToSVG, getIconData, tryInstallPkg } from '@iconify/utils';
 import createDebugger from 'debug';
 import { isPackageExists, resolveModule } from 'local-pkg';
+import type { FullIconCustomisations } from '@iconify/utils/lib/customisations';
 
 const debug = createDebugger('@iconify-core:icon');
 const debugModern = createDebugger('@iconify-core:modern');
@@ -53,17 +54,15 @@ export async function loadCollection(name: string, autoInstall = false): Promise
 	}
 }
 
-export function searchForIcon(iconSet: IconifyJSON, collection: string, ids: string[], scale = 1): string | null {
+export function searchForIcon(iconSet: IconifyJSON, collection: string, ids: string[], customize?: (defaults: FullIconCustomisations) => void): string | null {
 	let iconData: FullIconifyIcon | null;
 	for (const id of ids) {
 		iconData = getIconData(iconSet, id, true);
 		if (iconData) {
 			debug(`${collection}:${id}`);
-			const { attributes, body } = iconToSVG(iconData, {
-				...DefaultIconCustomizations,
-				height: `${scale}em`,
-				width: `${scale}em`,
-			});
+			const customizations: FullIconCustomisations = { ...DefaultIconCustomizations }
+			customize?.(customizations)
+			const { attributes, body } = iconToSVG(iconData, customizations);
 			return `<svg ${Object.entries(attributes).map(i => `${i[0]}="${i[1]}"`).join(' ')}>${body}</svg>`;
 		}
 	}