In your original question, you posed the scenario as though YOU had gone shopping.
I believe you said you were at the thrift store when the woman on the other side of the rack asked if you wore size 12.
You became offended and stepped out so she could get a full view of your body, and then insisted that she give you an amended answer as to what size she thought you wore - even though she explained that she was lousy at estimating sizes and had merely intended to point out a blouse she thought you might like.
She then hastily agreed that you were very skinny, and certainly no larger than a size 8 - and yet you continue to post this same question, asking whether you can accept her final answer.
Ergo, the answer is clearly, 'No.'
You can NOT accept her final answer, or else you would have left the entire 'question' alone and let it die a natural death.
She presumed, you corrected. What else is there to discuss? There is no 'acceptance' necessary of anything the woman said. What 'acceptance' is needed is yours - to accept your body as it is, and sizes be damned.
There is also no 'closure' necessary, as (again) YOU are the only one who is belaboring the issue. No one cares what size you wear. Certainly, the man in your life doesn't care. If he loves you, he thinks you look hot no matter WHAT the number on the tag inside your clothes reads.
It could read 6, 16, or 26 - if he's hot for you, he'll see you as though you were 'America's Top Model' and nothing less. If there is anything less, it is all seen through YOUR eyes. I really think you need to love yourself a little more and the 'numbers' a little less.
You are NOT what you wear.