A lady in my group joined in the summer and first weighed in wearing cropped trousers. She continued to wear these every week until December, when the cold got to her too much and she weighed in wearing normal length trousers. She gained 1/2 lb that week.
I know that people say not to get weighed in jeans, but I do. When I started in September, I knew that I had a loooonng way to go and would probably be a couple of years to target. So I planned ahead. What could I wear, summer and winter, and would probably weigh the same, even in smaller sizes? Jeans and a T-shirt. I even get weighed in my trainers.