Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_29 (display_size__in_ VARCHAR, model VARCHAR)
### Question:
Which Display size (in) has a Model of vaio pcg-u3?
### Answer:
SELECT COUNT(display_size__in_) FROM table_name_29 WHERE model = "vaio pcg-u3"