Double the following measurements: 33 mm, 415 cm, 243 m, 45 km, 220 m, 324, 49 cm, 74 km.

$$
33 \text{ mm} \times 2 = 66 \text{ mm}
$$

$$
66 \text{ mm} = 6 \text{ cm } 6 \text{ mm}
$$
The doubled value is $\boxed{\text{6 cm 6 mm}}$.

$$
415 \text{ cm} \times 2 = 830 \text{ cm}
$$

$$
830 \text{ cm} = 8 \text{ m } 30 \text{ cm}
$$
The doubled value is $\boxed{\text{8 m 30 cm}}$.

$$
243 \text{ m} \times 2 = 486 \text{ m}
$$
The doubled value is $\boxed{\text{486 m}}$.

$$
45 \text{ km} \times 2 = 90 \text{ km}
$$
The doubled value is $\boxed{\text{90 km}}$.

$$
220 \text{ m} \times 2 = 440 \text{ m}
$$
The doubled value is $\boxed{\text{440 m}}$.

$$
324 \times 2 = 648
$$
The doubled value is $\boxed{\text{648}}$.

$$
49 \text{ cm} \times 2 = 98 \text{ cm}
$$
The doubled value is $\boxed{\text{98 cm}}$.

$$
74 \text{ km} \times 2 = 148 \text{ km}
$$
The doubled value is $\boxed{\text{148 km}}$.

$$
245 \text{ cm} \times 2 = 490 \text{ cm}
$$

$$
490 \text{ cm} = 4 \text{ m } 90 \text{ cm}
$$
The doubled value is $\boxed{\text{4 m 90 cm}}$.