AN UNBIASED VIEW OF LARGE FORMAT POSTER PRINTING

I'm happy with the caliber of print out. Regretably, I have tried out this process a number of times and may’t have the sizing correct. Their sizing is precise, but dog is in between measurements so I assumed if I took a photo with added home in border my Canine can be lesser but they just zoomed in additional I assume and I've a giant Puppy.Be s