Thank you for viewing. Size: Approximately 30 x 30 x 125mm (Measured by a layman) I purchased this by mistake, thinking it was for the entryway. I tried it a few times on an interior door, but I rarely use it, so I'm putting it up for sale. I tried it a few times on an interior door, so there is a feeling of use, but there are no functional problems. For those who understand that this is a used item and has been stored at home, thank you in advance.