Fans shared a range of reactions, from calling out the unnecessary nature of body shaming while others pointed out that the character isn't supposed to be the muscular giant that someone like Batman or Superman would be.
Responding to comments about his thin physique, Gustin wrote: "I've had 20+ years of kids and adults telling me or my parents I was too thin". I went to an audition for a role I never dreamed I'd actually book. The look we've got at it so far is just a piece of concept art and a quick test photo that was clearly taken earlier on in the process.More news: Dozens killed, including children, in Yemen air strikes
When it comes to fan support for Grant Gustin in the face of body shamers, we are all The Flash.
"There's a double standard where it's ok to talk sh-t about a dudes body".
The Flash Season 5 suit appears to nearly resemble one of those Mego action figures as the material seems to be less leather-looking than the previous versions and has more cotton-like material. The outfit appears to be made of thinner material than the traditional leather and features a smaller Flash emblem and a new mask that does not cover Gustin's chin.More news: Lombok natural disaster : Strong aftershock amid rescue efforts
Gustin, 28, noted that he works hard to stay in shape and bulk up as much as he can, but the fact is he's "naturally thin" and his "appetite is greatly affected by stress" so packing on the pounds isn't easy.
"I love the suit that has been designed for me, and I think when everyone sees it in its entirtey, you will love it too", Gustin said. What's more, he loves being able to be a superhero so that other kids with bodies like his can see a representation of their body type onscreen and feel like they, too, can be a superhero. And for what it's worth, we just can't wait to see what unbelievable upgrades Barry is going to get with his season 5 suit. Recently, a glimpse of Barry Allen's new costume leaked onto the web.More news: Tottenham make £25m bid to sign 22-year-old