I know what you mean. Last time I went to the doctor the nurse weighed me. She started with the bottom weight at 200, then moved to 250, then to 300... when she finally got my weight she said I didn't look as big as I weighed- didn't know whether to take it as a complement or insult.
Last summer I lost about 60lbs and was down to 294 (it was a low fat/high exercise diet and you know how well those last). I went off it and managed to gain about 20lbs in 6 months before I started Atkins. I lost most of the weight I gained back and I'm back down to 298. I know I'm only 4lbs above my low weight now, and I feel almost the same size wise as I did then, but everytime I look in the mirror I think that something's not right. I feel like I should look smaller. I know 4 lbs isn't enough to make me that much larger. I guess it's all in my head.