I think she's slightly taller than Miranda Hart. I'm sure Miranda will play the Brienne character in a GoT takeoff, if she hasn't done it yet.

Totally awesome to see a girl the same height as me on tv..
rock on!

Like everyone else said she's 6'3", her character is around 6'5"-6'6" so they do make her look taller.

I believe the average loss is almost 2cm. Since her spine is long, it's believable that first thing out of bed she measures over 6ft 4 and by late evening falls to 6ft 3. You can see how much of a difference she has in height over a guy like me who measures 173cm:
http://www.celebheights.com/s/Gwendoline-Christie-47647.html

the average a person loses from morning to night is 2.7cm , that is about 1.1 inches ,many lose even more than that,1.5 inches isn't that uncommon at all.
Also, if you research this a bit you will also find out that physically,the taller one is,the more one loses during the day,this has to do with the backbone condensing/pushing together from the physical stress the body experiences whenever one isn't laying down on ones back,the most stress for the back is when sitting,for there is no leg support even.
So 1.5 inches is quite common,especially for someone of 6'3. This goes for healthy bodies/people. If one has a medical condition then one can lose many inches as one gets older, like Clint Eastwood went from 6'4 in the early-mid 80s at his peak to 5'11.5 by early 10s. Schwarzenegger was 6'1.5 at his peak,and now stands at 5'11.25(1ebcand his upright standing hair gives the illusion of a 6footer still). However Stallone,for ex,having been 5'9'5 at his peak, has only lost about half an inch,which is why looks not that much shorter than Arnold.
In this case however,she can go from 6'4.5 to 6'3 very much so,while being healthy.The more physical movement/excercise she does,the more she stands up during the day,the more she will lose,backbone stress.

Most people are taller in the morning.
Not 1.5 inches taller.

That would look like Austin Powers with Mini Me when they were casting that shadow on the partition.
Cancel my subscription to the Resurrection. Send my credentials to the house of detention.

I think the armour costume makes her much larger than she really is.

I'd pay good money for a picture of Peter Dinklage boning her.

She says between 6,3 and 6,4 1/2; it's depending when you're measuring her.
Most people are taller in the morning.
Ich bin kein ausgeklgelt Buch, ich bin ein Mensch mit seinem Widerspruch.
Conrad Ferdinand Meyer

Thanks for the reply. I saw here bio section as blank, but didn't think to look further down the page.
A true beauty
http://www.imdb.com/board/22963158/board/thread/128734596

6'3" according to IMDB. I've also seen her listed at 6'4"