Small, Flat, & Shades of Brown
If you’re wondering what bed bugs look like, they are actually very difficult to spot, especially if they are young. Adult and large nymphs are small, flat, oval-shaped and medium brown. Adult bedbugs can grow up to 7 mm in length, while babies can be as small as 1.5 mm. Adult bedbugs are reddish brown in color, appearing more red after feeding, while young bed bugs are clear in color and become bright red after eating.