diff --git a/lib/prawn/svg/elements/use.rb b/lib/prawn/svg/elements/use.rb
index ea14be0..36221f2 100644
--- a/lib/prawn/svg/elements/use.rb
+++ b/lib/prawn/svg/elements/use.rb
@@ -1,15 +1,12 @@
 class Prawn::SVG::Elements::Use < Prawn::SVG::Elements::Base
-  attr_reader :referenced_element_class
-  attr_reader :referenced_element_source
+  attr_reader :referenced_element_class, :referenced_element_source
 
   def parse
     href = href_attribute
-    if href.nil?
-      raise SkipElementError, "use tag must have an href or xlink:href"
-    end
+    raise SkipElementError, 'use tag must have an href or xlink:href' if href.nil?
 
     if href[0..0] != '#'
-      raise SkipElementError, "use tag has an href that is not a reference to an id; this is not supported"
+      raise SkipElementError, 'use tag has an href that is not a reference to an id; this is not supported'
     end
 
     id = href[1..-1]
@@ -29,14 +26,18 @@ def parse
       end
     end
 
-    if referenced_element_class.nil?
-      raise SkipElementError, "no tag with ID '#{id}' was found, referenced by use tag"
+    raise SkipElementError, "no tag with ID '#{id}' was found, referenced by use tag" if referenced_element_class.nil?
+
+    if referenced_element_source.name == 'symbol'
+      @referenced_element_class = Prawn::SVG::Elements::Viewport
     end
 
     state.inside_use = true
 
     @x = attributes['x']
     @y = attributes['y']
+    @width = attributes['width']
+    @height = attributes['height']
   end
 
   def container?
@@ -45,16 +46,23 @@ def container?
 
   def apply
     if @x || @y
-      add_call_and_enter "translate", x_pixels(@x || 0), -y_pixels(@y || 0)
+      add_call_and_enter 'translate', x_pixels(@x || 0), -y_pixels(@y || 0)
     end
   end
 
   def process_child_elements
-    add_call "save"
+    add_call 'save'
+
+    source = referenced_element_source.dup
+
+    if referenced_element_class == Prawn::SVG::Elements::Viewport
+      source.attributes['width'] = @width || '100%'
+      source.attributes['height'] = @height || '100%'
+    end
 
-    child = referenced_element_class.new(document, referenced_element_source, calls, state.dup)
+    child = referenced_element_class.new(document, source, calls, state.dup)
     child.process
 
-    add_call "restore"
+    add_call 'restore'
   end
 end
diff --git a/spec/sample_svg/symbol.svg b/spec/sample_svg/symbol.svg
new file mode 100644
index 0000000..33eb7aa
--- /dev/null
+++ b/spec/sample_svg/symbol.svg
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg viewBox="0 0 1000 1000" xmlns="http://www.w3.org/2000/svg" xmlns:xlink='http://www.w3.org/1999/xlink' version="1.1">
+  <symbol id="rects" viewBox="0 0 100 100">
+    <rect x="10" y="10" width="80" height="80" fill="none" stroke="red"/>
+    <rect x="20" y="20" width="60" height="60" fill="none" stroke="green"/>
+    <rect x="30" y="30" width="40" height="40" fill="none" stroke="blue"/>
+  </symbol>
+  <rect width="1000" height="1000" fill="none" stroke="black"/>
+  <use x="100" y="100" width="800" height="800" xlink:href="#rects"/>
+  <use x="400" y="400" width="200" height="200" xlink:href="#rects"/>
+</svg>
\ No newline at end of file