As long as you have roughly the same build as original Vader body actor David Prowse, that is. Prowse, who is 6'6", was also bodybuilder. All actors who ended up in the Vader suit at major events in the '80s were about that size. So basically this costume will only fit someone with the dimensions of Rob Gronkowski, really. The rest of us will just be proud to own an amazing collectible.
This Vader suit doesn't come cheap, though.
First, here's Bonhams' description of what they have on the block:
A complete Darth Vader costume from The Empire Strikes Back/Star Wars EpisodeTwentieth Century-Fox, 1980. Comprising:
Vader's helmet: a fiberglass facemask featuring plastic lenses, mesh mouth cover, and original straps and foam padding, together with fitted dome helmet;
Shoulder armor: painted fiberglass with hinged shoulders;
Jerkin: black muslin blouse with stitched black leather sleeves, ties and closure in back;
Vest: black stitched leather reversed motorcycle-type vest with zippered closure at back;
Pants: black stitched leather motorcycle-type pants with zippered fly, gaberdine shins (to ankle), and bootstraps, with suspenders supplied by Eller during appearance career;
Inner cape: very dark gray shading to black wool slender shoulder cape, with armholes;
Outer cape: large black wool cape with leather collar and clasp;
Gloves: stitched black leather epaulette-style motorcycle-type gloves, not production made;
Chestbox: of fashioned black and silver plastic, with corresponding battery pack;
Belt: leather, metal and plastic composite;
Codpiece: cardboard base covered in black leather, with velcro clasps;
Shin guards: black vacuum-formed plastic with velcro straps;
Boots: a pair of knee-high black leather gentleman's riding boots, labeled in pen to interior, "Mr. Prowes";
With two pair of black tights worn by Mr. Eller under suit, not production made.
All items housed in two original flight cases with original travel stickers to surfaces.
Who's the "Mr. Eller" mentioned at the end above? That's where the suit's provenance gets a little complicated.
Eller was Kermit Eller (who now goes by Bryce), a tall actor with a powerful James Earl Jones-like voice who made public appearances as Vader for the first couple of films. From 1977 to '79, according to the auction house, Eller "wore the screen-used Vader costume, the only one produced for the film."
The same listing also has this slightly confusing note:
We can say with confidence that this entire suit, save the gloves, is production made, one of a handful made by John Mollo's team at Elstree Studios in London in 1979. Some components may have been screen-used, but it is difficult to say at this point. Nonetheless, this suit's completeness, remarkable condition, and excellent provenance make it a true rarity in the memorabilia marketplace.
They are prepared to have the suit analyzed by a memorabilia expert, on demand.
That's a necessary step, no doubt, since Bonhams is asking up to $2 million for the thing.
Regardless who sweated inside the suit 40 years ago, it looks like it's about as real as the real deal can get at this point.