The figure is a 3 × 3 grid, like a noughts-and-crosses board with its outer border drawn.

Explanation

1. 01

   $1 \times 1$ squares: $3 \times 3 = 9$.

2. 02

   $2 \times 2$ squares: $2 \times 2 = 4$.

3. 03

   $3 \times 3$ squares: $1 \times 1 = 1$.

4. 04

   Total $= 9 + 4 + 1 = 14$.