Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What are the imperial size for the unit that has a ratio of 1/20?

### Inputs:
table_name: table, columns: ['Unit', 'Russian', 'Translation', 'Ratio', 'Cubic inches (exact)', 'Metric value', 'Imperial', 'US Customary']

### Response:
SELECT Imperial FROM table WHERE Ratio = 1/20