People have asked if reflections should be longer, shorter, or the same as the actual object. The annoying answer is “It depends.” I made a little sailboat (about 3 inches high) by carving a white vinyl eraser and making a sail by cutting a credit card, painting it white and drawing a curve with a sharpie. I placed the model on a hand mirror and took some shots. I have done the same thing with toys of animals, people, etc. I like to make little quick model set-ups to study such problems, including light, shadow, etc. As you can see, the height of the reflection depends on the angle of the object vs. the mirror surface. The same thing applies to mountains or trees along a lake edge.