Regarding this question, if you want to modify the size of Temu products, you can follow the steps below:

1. Log in to Temu's management backend.

2. Find the product whose size you want to modify and click to enter the product details page.

3. On the product details page, you can find the size information of the product. There is usually a size field or an input box for length, width and height.

4. Modify the size data of the product in the field or input box. You can modify it as needed. Make sure the size data you enter is accurate.

5. After the modification is completed, remember to save your changes. There is usually a save button or an option to confirm the modification.

6. After confirming the save, the size of your product will be modified to the new value you entered.

Please note that the specific modification steps may vary depending on the platform or system. The above steps are only general operating guidelines. You can perform the corresponding operations according to the specific situation. If you still encounter difficulties, it is recommended that you consult the help documents of the relevant platform or contact customer service for further assistance.