I have this in a table inside my Qweb view:

                        <td>
                            <span t-field="line.product_id.image_small"
                                t-field-options='{"widget": "image", "size": [64,64]}' />
                        </td>

However, the image is still being displayed at an enlarged size, to take up the space in the table cell.  This makes it blurry.  How do I keep it to the original size, or otherwise control the display dimensions?