Obese Pony: Hey! A boutique big enough to fit me. Can I shop here?
 
Rarity & Sassy Saddles: No!

@Background Pony #9F26  
You know sumo wrestlers are revered in Japan and they are huge.
 
This thing still grosses me out.

Where’s the buffet?

Her legs would not be that small.
 
She’d have legs like a workhorse.

@Telaros  
Are you kidding? They’d be looking at her like “We’re gonna be earning our money today.”

@Japanese Teeth  
Hehe cute! :D
 
She needs more fanart love.

@Beau Skunky  
Someone already did, and she looks adorable (if a bit large):
 

@Telaros  
No, there was no “body-shaming” whatsoever.
 
And frankly, her hugeness makes her kinda unique/adorable.

@Amagan  
I hope that wasn’t the case. Their looks of disbelief of how big she was before doing that “NO!” and laughing almost felt like someone was being a bit mean spirited.

I still say she’s adorable.
 
Now somebody draw her in an ill-fitting “Princess” dress she wanted so badly. :P

That look of sheer terror on their faces.

Thumbnail made it look as if Sassy was wearing fishnets…

…She is her own cutie mark… SHE IS HER OWN CUTIE MARK!!!!

I did think it was weird as well, but indeed, no one actually mentioned her size at all.

@Japanese Teeth  
Yeah… Kind of makes me wonder what was going through their minds, when they decided to add this.
 
Don’t get me wrong though, this was a pretty good episode, I loved concept of it and I thought it was handled really well. I’d give it an 8/10 rating.

@DoomPony  
That is true, and I can agree 100%. But to me, this scene seemed too far out of the norm by MLP standards.

@SLB94  
It’s a weird moment no matter how you look at it, though. Seriously, the whole design is just… out there.

@Japanese Teeth  
Now that you put it that way, It actually does make more sense. I think I was so focused on how overweight this pony was, that I interpreted it the wrong way. As you said, It really wasn’t her weight that was the issue, it was just the dresses being sold out.
 
I guess my issue with this scene is, it could have been handled better. For me it was too sudden, too far out of the norm for MLP.

@SLB94  
I dunno, I don’t think the joke would’ve worked like that. The joke isn’t “this pony is fat!” so much as “this pony has a really non-standard character design” (Bulk Biceps is a good comparison; the whole joke is that his design doesn’t match the art style at all). Like DoomPony said, the joke would’ve been functionally the same with a non-fat pony so long as the design was sufficiently bizarre. And I think that’s where the crux of the issue is: the joke isn’t the fatness, it’s that the pony looks nothing like any of the other ponies that have appeared on the show, so her sudden appearance is a bit of a shock.
 
But it’s never implied in-universe that she’s being mocked or belittled for it. The only reason that they refuse her request is because they discontinued the dress she wanted. Her size has nothing to do with that.

I’m wondering if her cutie mark means she’s full of herself.

@SLB94  
How chubby are we talking? A Mrs. Cake recolor wouldn’t have been unusual. The joke (if you consider it one) would have also worked with a super-tall thin pony, like a standard filly body with Celestia’s legs. Imagine that for a second, Sweetie Belle with Celestia’s legs.

So the animators couldn’t help themselves could they. This pony could have been made at least somewhat chubby, and the joke still would have worked, but instead they went all out on this one.

@Lyeco  

 
Eh…kinda depends on where you live, IME. Southern states seem to have the biggest problem, no pun intended, but northern cities, e.g. Detroit, have obesity problems, where there’s a large low-income population. The underlying problem is readily available, very cheap, high-carbohydrate foods. It doesn’t help that our government subsidizes corn disproportionately, and therefore, indirectly, the production of corn syrups, i.e. high-carb sugars.

“A fat woman walked into the store today”

@Lyeco
 
Blame the food.
 
…And genetics, I guess.