Hi Sam,
You can edit the Search field size by
1)goto file: public_html/storefront/view/default/stylesheet/style.css
2) Search for
.top-search input {
width: 100%;
border: 4px solid #F5F5F5;
padding: 6px;
float: left;
vertical-align: middle;
}
Now edit the width % based on your choice. You can also choose where to keep the search box (Left or right)
Hope this helps.
Regards,
Praveen