diff --git a/src/jrummikub/model/StoneSet.java b/src/jrummikub/model/StoneSet.java
index 09eecd5..98d952f 100644
--- a/src/jrummikub/model/StoneSet.java
+++ b/src/jrummikub/model/StoneSet.java
@@ -12,7 +12,8 @@ import sun.reflect.generics.reflectiveObjects.NotImplementedException;
 import jrummikub.util.Pair;
 
 /** Class managing {@link Stone}s joined together to form sets */
-public class StoneSet implements Iterable<Stone> {
+public class StoneSet implements Iterable<Stone>, Sizeable {
+	float border = 0.125f;
 	private List<Stone> stones;
 
 	public StoneSet(Stone stone) {
@@ -147,4 +148,14 @@ public class StoneSet implements Iterable<Stone> {
 		};
 	}
 
+	@Override
+	public float getWidth() {
+		return stones.size() + 2 * border;
+	}
+
+	@Override
+	public float getHeight() {
+		return 1;
+	}
+
 }