diff --git a/microbitmatrix/microbitmatrix-v1.go b/microbitmatrix/microbitmatrix-v1.go
index 7416d64..c4781b1 100644
--- a/microbitmatrix/microbitmatrix-v1.go
+++ b/microbitmatrix/microbitmatrix-v1.go
@@ -70,7 +70,6 @@ func (d *Device) Display() error {
 			if d.buffer[row][col] {
 				d.pin[col].Low()
 			}
-
 		}
 		time.Sleep(time.Millisecond * 2)
 	}
@@ -105,8 +104,3 @@ func (d *Device) EnableAll() {
 		d.pin[i-machine.LED_COL_1].High()
 	}
 }
-
-// Size returns the current size of the display.
-func (d *Device) Size() (w, h int16) {
-	return 5, 5
-}
diff --git a/microbitmatrix/microbitmatrix-v2.go b/microbitmatrix/microbitmatrix-v2.go
index 27f478e..a107fa3 100644
--- a/microbitmatrix/microbitmatrix-v2.go
+++ b/microbitmatrix/microbitmatrix-v2.go
@@ -114,8 +114,3 @@ func (d *Device) EnableAll() {
 		d.pin[5+i].High()
 	}
 }
-
-// Size returns the current size of the display.
-func (d *Device) Size() (w, h int16) {
-	return 5, 5
-}
diff --git a/microbitmatrix/microbitmatrix.go b/microbitmatrix/microbitmatrix.go
index 7b23a90..f6a62ef 100644
--- a/microbitmatrix/microbitmatrix.go
+++ b/microbitmatrix/microbitmatrix.go
@@ -40,3 +40,8 @@ func (d *Device) GetPixel(x int16, y int16) bool {
 	}
 	return d.buffer[matrixRotations[d.rotation][y][x][0]][matrixRotations[d.rotation][y][x][1]]
 }
+
+// Size returns the current size of the display.
+func (d *Device) Size() (w, h int16) {
+	return 5, 5
+}