diff --git a/js/texturing/texture_generator.js b/js/texturing/texture_generator.js
index 481731f4..72091b80 100644
--- a/js/texturing/texture_generator.js
+++ b/js/texturing/texture_generator.js
@@ -374,6 +374,17 @@ const TextureGenerator = {
 			uv_only: true,
 			uv_mode: true
 		})
+		// Warning
+		if (cubes.find(cube => {
+			let size = cube.size();
+			return (size[0] > 0.001 && size[0] < 0.999) || (size[1] > 0.001 && size[1] < 0.999) || (size[2] > 0.001 && size[2] < 0.999)
+		})) {
+			Blockbench.showMessageBox({
+				title: 'message.small_face_dimensions.title',
+				message: tl('message.small_face_dimensions.message') + (Format.optional_box_uv ? '\n\n' + tl('message.small_face_dimensions.face_uv') : ''),
+				icon: 'warning',
+			})
+		}
 	},
 	boxUVdrawTemplateRectangle(border_color, color, face, coords, texture, canvas) {
 		if (typeof background_color === 'string') {
diff --git a/lang/en.json b/lang/en.json
index 5af4a449..192eb33c 100644
--- a/lang/en.json
+++ b/lang/en.json
@@ -228,6 +228,10 @@
 	"message.duplicate_groups.title": "Bone Name Duplicate",
 	"message.duplicate_groups.message": "The name of this bone exists on multiple bones. This can cause problems.",
 
+	"message.small_face_dimensions.title": "Incompatible Face Dimensions",
+	"message.small_face_dimensions.message": "The selection contains faces that are smaller than 1 unit in one direction. The Box UV mapping system considers any faces below that threshold as 0 pixels wide. The texture on those faces therefore may not work correctly.",
+	"message.small_face_dimensions.face_uv": "The current format supports per-face UV maps which can handle small face dimensions. Go to \"File\" > \"Project...\" and uncheck \"Box UV\".",
+
 	"message.import_palette.replace_palette": "Replace old palette",
 	"message.import_palette.threshold": "Merge Threshold",