diff --git a/api/lib/prices.py b/api/lib/prices.py
index 3a24811..633c120 100644
--- a/api/lib/prices.py
+++ b/api/lib/prices.py
@@ -80,13 +80,19 @@ def wallpaper_price_new(
         height,
         material,
         market,
+        unit,
         inquiry=None,
 ):
     m2_prices = wallpaper_m2_price_new(product_id, material.id, market, inquiry)
 
+    if (unit == 'inch'):
+        width = width * 2.54
+        height = height * 2.54
+
     sqm = (width / 100) * (height / 100)
 
-    min_sqm = 1
+    # 0.09 m2 = 30x30 cm, which means we can accept 1 sq feet (0.0929 m2)
+    min_sqm = 0.09
 
     sqm = max(sqm, min_sqm)
 
@@ -207,6 +213,7 @@ def inquiry_price_new(
 ):
     width = kwargs.get("width", inquiry.width)
     height = kwargs.get("height", inquiry.height)
+    unit = kwargs.get("unit", None)
     material = kwargs.get("material", inquiry.material)
     external_id = kwargs.get("external_id")
 
@@ -220,9 +227,9 @@ def inquiry_price_new(
         return prices
     elif inquiry.product_group == "photo-wallpaper":
         if is_own_image:
-            prices = wallpaper_price_new(None, width, height, material, inquiry.market, inquiry)
+            prices = wallpaper_price_new(None, width, height, material, inquiry.market, unit, inquiry)
         else:
-            prices = wallpaper_price_new(product_id, width, height, material, inquiry.market, inquiry)
+            prices = wallpaper_price_new(product_id, width, height, material, inquiry.market, unit, inquiry)
     else:
         raise ValueError("Invalid product group: {}".format(inquiry.product_group))
 
diff --git a/api/resources/prices.py b/api/resources/prices.py
index f0df0ed..d85a3bf 100644
--- a/api/resources/prices.py
+++ b/api/resources/prices.py
@@ -45,23 +45,24 @@ def get_designer():
 @validate_number("width", "height")
 @validate_exists("market")
 def wallpaper():
-    width = request.args.get("width", type=int)
-    height = request.args.get("height", type=int)
+    width = request.args.get("width", type=float)
+    height = request.args.get("height", type=float)
     market_id = request.args.get("market", type=int)
     product_id = request.args.get("product", type=int)
+    unit = request.args.get("unit", type=str)
     new_version = request.args.get("new_version") is not None
     market = Market.query.get_or_404(market_id)
     designer = get_designer()
     reseller = get_reseller()
 
     if width is None or height is None:
-        raise ValidationError("width and height must be integers")
+        raise ValidationError("width and height must be float")
 
     materials = Material.query.wallpapers().all()
     data = []
     for material in materials:
         if new_version:
-            prices = wallpaper_price_new(product_id, width, height, material, market)
+            prices = wallpaper_price_new(product_id, width, height, material, market, unit)
             data.append(
                 {
                     "material": material.name,
@@ -146,8 +147,18 @@ def get_inquiry_measurements(inquiry):
 
     # first try to get it from the query string. If that fails try to get it
     # from the inquiry row in the database
-    width = request.args.get("width", type=int, default=inquiry.width)
-    height = request.args.get("height", type=int, default=inquiry.height)
+    unit = request.args.get("unit", type=str, default=None)
+    width = request.args.get("width", type=float, default=None)
+    height = request.args.get("height", type=float, default=None)
+
+    if unit and not (width and height):
+        raise Exception("With unit in query string width and height must also be there.")
+
+    if not width:
+        width = inquiry.width
+
+    if not height:
+        height = inquiry.height
 
     # if we still are missing a width/height just set them to 1 to avoid
     # errors in the price calculations
@@ -157,24 +168,25 @@ def get_inquiry_measurements(inquiry):
     if not height:
         height = 1
 
-    return width, height
+    return width, height, unit
 
 
 def inquiry_wallpaper(inquiry, new_version=False):
-    width, height = get_inquiry_measurements(inquiry)
+    width, height, unit = get_inquiry_measurements(inquiry)
 
     data = {
         "id": inquiry.id,
         "group": "wallpaper",
         "width": width,
         "height": height,
+        "unit": unit,
         "retouch_price": inquiry.local_price_retouch(rounded=False, inc_vat=True),
     }
     materials = Material.query.wallpapers().all()
     prices = []
     for material in materials:
         if new_version:
-            price = inquiry_price_new(inquiry, material=material, width=width, height=height)
+            price = inquiry_price_new(inquiry, material=material, width=width, height=height, unit=unit)
             prices.append(
                 {
                     "material": material.name,