Select the number of squares in the figure.

To find the total number of squares in a standard $3\times 3$ grid layout, we count the squares of each size step-by-step:
1. Small individual squares ($1\times 1$ size):

$$3\times 3=9$$

2. Medium combined squares ($2\times 2$ size):

$$2\times 2=4$$

3. Large overall square ($3\times 3$ size):

$$1\times 1=1$$

Adding these values together provides the total number of squares:

$$\text{Total Squares}=9+4+1=14$$

Hence, the correct option is B.