Think I understand what you are asking .The biggest hoop is 12 1/2 inches long . I haven't used this one so not sure exactly how far back it goes... Probably have to have at least 10 inches clearance ,out to the side probably 3 inches. That is one of the reasons I purchased the Janome instead of the brother because the brother was so much bigger and needed more room.
Hope I have understood your question.