Textfield component size/width

Hi,
I have a textfield that must accept a number like 123,45 but the text field size is big like other textfields.
I need to put in a layout with many textfields and so it must be small, how can I change size on screen?
Thanks,
Mario

found by myself, in need to use “size” attribute. I supposed component will resize depending on binded field length but it is not so.