Orange-sized is a descriptive way of referring to something about the same size as an orange. However, if you were looking for synonyms for this term, there are many options to choose from. You might refer to something as being "golf ball-sized," "ping-pong ball-sized," or "snooker ball-sized" if you are thinking in terms of small, spherical objects. "Fist-sized" is another option when it comes to talking about objects that can fit comfortably in your grip. For larger items, you might use terms like "grapefruit-sized," "melon-sized," or "basketball-sized" depending on just how big the object is.