To find Mel's height, you can set up the equation based on the information given:
\[ 4 \times \text{Mel's height} = 26 \]
Now, to solve for Mel's height, divide both sides of the equation by 4:
\[ \text{Mel's height} = \frac{26}{4} = 6.5 \]
Mel's height is 6.5 units (the unit of measurement is not specified).