While Ley might tell you that physical descriptions are entirely unnecessary outside of maybe basic identifiers, there is some importance to providing a description for your readers. It helps anchor them in the world and visualize the characters. Finding the right descriptions, though, is difficult, especially when trying to describe various body types. Like any character, it's important to be respectful when describing different physical body types. Listen for more about different words and metaphors that can be useful, and cautions against what might be offensive to readers.