user: Question: Which Display size (in) has a Model of vaio pcg-u3?
Columns: ['Model', 'Manufacturer', 'Weight (kg)', 'Display size (in)', 'Processor model', 'Storage type']
Types: ['text', 'text', 'real', 'real', 'text', 'text']
Sample row: ['EeePC 4G', 'Asus', 0.99, 7.0, 'Intel Celeron M', 'SSD']
SQL:

assistant: SELECT "Display size (in)" FROM "Table" WHERE "Model" = 'vaio pcg-u3';