Let me get this out of the way first - I don't hate skinny women. Whenever this topic comes up, someone gets all pissed off and leaves a comment about how much I hate skinny women and that I'm a Mean Fatty. I'm sorry but no, I do not hate skinny women. That would be a little counterproductive to that whole "size acceptance" thing, right? Right. Moving on.
If you've spent time perusing the many and varied plus size retailers on the internet, you'll notice that some of them use straight sized models. I have a major issue with this. Actually, there are a few major issues:
First, it's impractical. The point of using a model is to show how the item of clothing will look on an actual human being, as opposed to a dress form or hanger. That's why models are called "models." It's really hard to imagine how a dress will look on a plus sized body when the model is not plus sized, or anywhere near it.
Second, it looks ridiculous.

Third, and I'm making my own educated guess on this, these retailers believe that their plus size customers don't want to see the clothing on plus size models. Let me restate that - they think that fat people don't want to look at other fat people.
Has fat hatred become so ingrained that fat people really don't want to even look at other fat people? Or are these retailers full of crap and refuse to take a step into realty? Have they heard of market research?
I'm not sure but either way, the logic is stupid. Looking at a fat person wearing an item of clothing that you might want to buy is not going to ruin your self esteem. If anything, you'll be more down when you realize that, um, you don't look that skinny model once you get the clothes on your body.
These retailers are trying to sell a fantasy. This is something all retailers do but it's a little screwed up to sell a fantasy of thinness to fat people when your job is to sell clothes to fat people.
And lest you think that this is limited to women's clothing, check it:

The two pictures above are from catalogs produced by the same company
and are generally geared towards an older buyer who may not be ready to look at
fat people wearing clothes made for fat people. I'm sure their clothes
are great but they need to move past the skinny model days and into the
light.
Here's the irony - some of the companies that use skinny models are also the companies that carry the widest range of sizes.
Is it better for them to say "Hey, you're fat. Here are some clothes
you might want to buy and here are some plus size models to show you
how the clothes look on a fat body" or "Hey, you're fat. Here are some
clothes you might want to buy but we won't show you how they look on
someone within your size range because you're so delusional that you'll
believe that these models are just very small fat people."
To be fair, most plus size retailers now use plus size models, even if they are pushing the definition of "plus size." The very nature of models and branding is all based in fantasy but it's nice when the fantasy is at least relevant to my realty, even if just a little bit.
I know some of you out there are thinking "My options are limited and I have few retailers to choose from. What the hell do I do?" I have ideas!
Buy from retailers that use plus size models whenever you can. Some are more daring with their models than others. For instance, b&lu uses models in a wide range of sizes while mass retailers like Lane Bryant stick to a conservative "plus" size. We should congratulate retailers like b&lu and encourage other retailers to follow their lead.
Second, if you're hopelessly devoted to a particular retailer who uses skinny models and you don't want to stop shopping with them, tell their customer service all of the many reasons why they should use plus size models. And make sure to mention how happy you'd be to recommend their products to your friends... if they could get past that whole skinny model thing.