Code:

fig, axes = plt.subplots(2, 6)

for row in axes:
    for ax in row:
        ## Set limits
        ax.set_xlim(-1, 1)
        ax.set_ylim(-1, 1)

        ## Set aspect ratio
        ax.axis('scaled')

## Plot
plt.tight_layout(pad=0.5)
plt.show()

Output:

Removing ax.axis('scaled) removes the large space between the rows, but I would like the plot to be scaled:

It is possible to adjust the spacing between the rows using figsize manually, however, making the spacings between the subplots has to be done by eye.