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Size Increase

Stories that feature guys that get bigger—generally involving an increase in height and muscle mass.

Kinds of “Size Increase” stories include:

    Other tags that also fall under the category “Size/Size Difference”: Getting Taller, Giants, Plausible Size Difference, Size Decrease.

    Stories found: 429.

    Something missing? We’re always looking to improve the way our stories are tagged. If you know of a story that should be added to this page, please go to the story page and use the tag suggestion feature—the link is directly under the list of tags.

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    Complete story list for Size Increase:

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    • Abyssus Abbey by Pen Darke(17 parts)Demons Horror Incub XCock Grow Supn Tf  Welcome to Abyssus Abbey… a place where monks study and summon demons in an attempt to prevent the Apocalypse. The demons are in the walls, listening to your words, your thoughts, your desires, and if you fall prey to any of the Twelve Temptations, you may find yourself changed in ways you may not have expected. The Abbey has always drawn and doomed those who seek power and knowledge, and if you’re lucky, you might find something else there: a change in your outlook, a surprising ability, a friend where no friend was expected, and even romance. But all pleasures come with a price, and sooner or later the devil will have his due. Come in. Join the damned.  Added Feb 2020  •  Updated May 2020  •  124.8K words
      6,942 views
    • The accidental wizard by nolanspice(2 parts)AgeDown MGrow Musc PSD Rep Grow Tf    Added Jan 2006  •  2.9K words
      16,567 views
    • The acolytes by Richard Jasper(7 parts)CGrow Hair Taller Cock HyCock HMusc Strong MGrow Musc Grow  It all started with an arm-wrestling contest. Blond surfer god Mike Schnelling, 5’10”, 175 lbs., wanted to take me on. Which was fine but I had 50 lbs. on him, all muscle. We never could have imagined how it would all turn out!  Added Aug 2020  •  8.1K words
      3,601 views
    • Adam’s first growth spurt by MDS  Bro Giant Cock MGrow Musc Grow  Adam comes home from a day of being bullied at school to find he definitely won't have to worry about anything like that after today.  Added Nov 2016  •  2.4K words
      31,540 views
    • Adam’s milk by Adam Zander(2 parts)CGrow HyCock MusBr NipCum Grow  Adam’s dreams of growing massive pec-tits like the wrestlers he admires come true—in spades.  Added May 2015  •  2.6K words
      37,196 views
    • The adventures of Rex by Richard Jasper(6 parts)CGrow Demons Fant Cock MGrow Musc Ogres Race Grow Tf Series  MLB Player Rex Chastain is dragooned into the service of a wizard but a magical transformation goes somewhat awry.  Added Feb 2020  •  3.9K words
      3,973 views
    • Afternoon swim by Viva Wales  CGrow FootGr Taller Cock HyCock Grow    Added May 2002  •  1.5K words
      30,702 views
    • Aiden and Andrew by JB  Musc PSD Grow Vore  Two roommates have some fun, inside and out.  Added May 2019  •  3.4K words
      5,920 views
    • Alex and the giant by JB  Giant PSD Shr Grow  Alex finds himself irresistibly attracted to a man who can change his size at will.  Added Jan 2019  •  4.3K words
      9,131 views
    • Alex in Wonderland by Anarchy A(3 parts)CGrow Balls Cock HyCock Cum HMusc MGrow Musc Shr Grow  Alex follows mysterious man into a forest, and quickly finds himself in a strange new world, deep below the ground.  Added Jan 2016  •  Updated Apr 2017  •  6.2K words
      34,045 views
    • All or nothing by Double-U  MGrow Musc Grow  Take a step into Allan Rader’s thoughts and explore a strange new casino that hasn’t opened up to the public yet. Will Allan get some BIG returns?  Added Sep 2016  •  2.2K words
      10,069 views
    • Alpha by CharitysSongbird  Fur CGrow Dom Taller Balls Cock HyCock MGrow Musc Self Grow Tf Were  Used to being smaller than his office mates, especially his crush Tavy, Ritzy is stunned when he suddenly starts getting bigger and furrier, even as the impulse to dominate seeps into his personality.  Added Aug 2018  •  14.3K words
      24,261 views
    • Alt-world by BRK(2 parts)CGrow Cock HyCock XArm XLimb Musc PSD Rep Grow Twins  The alternate reality was constructed so the guys fell within broad parameters. Except they were a little skewed toward the exceptional. And something in the software seemed to like outliers...  Added Jul 2011  •  5.3K words
      24,135 views
    • Altered by Dream Big(5 parts)CGrow Hair Taller Cock 2Anim Pher MGrow Musc Nonc Bond Grow  Chris wakes up in a strange laboratory, only to learn he’s one of a number of subjects in a mysterious program that involves alterations to the male human body. At least the guy they have looking after him seems sympathetic… and very, very sexy.  Added Jan 2020  •  Updated May 2020  •  9.5K words
      11,605 views
    • Amplifications by Also Known As(5 parts)Cock MGrow Musc Grow Series    Added Jan 2014  •  22.6K words
      18,448 views
    • Anomalous Materials Research Facility 3‑DL by Mad Dog and Gurak(6 parts)Fur Cent CGrow Demons Cock HyCock Mpreg XCock XHead XLimb Orcs Grow Tf  Working with exotic materials on a distant research space station is all in a day’s work for Carter, a theoretical physicist and the sole mundane human in a crew of sexy (and sex-loving) creatures straight out of a very dirty fantasy novel. But when you work with stuff that scoffs at the laws of physics, normality can’t remain unbent forever.  Added Sep 2019  •  Updated Mar 2020  •  32.5K words
      12,056 views
    • Another nerd story by Sithspawn(2 parts)CGrow Taller Cock Strong MGrow Musc Nano Grow  Ollie is your typical nerd who asks his neighbour for help dealing with the local bully. Tom offers some advice that leads to an encounter he'll never forget.  Added Apr 2020  •  Updated May 2020  •  9.1K words
      6,505 views
    • Antony Smith by Keliadom(3 parts)FootGr Taller Giant Infl Nonc Shr Grow Str    Added Dec 2004  •  3.5K words
      25,805 views
    • Anything to grow by Big Bull Trainer  Dumb Immob MGrow Musc Grow Tf  There are some with an unquenchable desire to not only grow, but to grow to unnaturally large proportions, and will go to any lengths to do it. This is a story of just such a person.  Added Aug 2016  •  7.8K words
      30,963 views
    • The application by SuperWaffle(8 parts)Fur MGrow Musc Grow  A powerful story in which an anthro fox named Bradley learns that a body-morphing app is a wondrous, life-changing thing for himself and for new friends as well—if it doesn’t fall into the wrong hands, that is.  Added Apr 2015  •  44.5K words
      35,555 views
    • Are you sure by Dream Big(5 parts)Bi CGrow Taller Het Balls Cock Cum MGrow Musc Race Self Grow  Suddenly awash with money, Bill takes the plunge and follows the stories of secretly augmented men and women to a remote lab where they promise to fix everything he doesn’t like about his body.  Added Nov 2019  •  6.2K words
      6,553 views
    • The Arsenal of Secrets by BRK(10 parts)CGrow Fant Taller Cock XAbs XArm XLimb MGrow Grow Tf Series  Griffin, tired of being smaller than his farm-brute brothers, stumbles backwards into a way to make himself more like what he wants to be: big and strong enough to catch the eye of a beautiful, bashful, broad-shouldered apprentice blacksmith named Wass.  Added Aug 2020  •  25.8K words
      2,547 views
    • Arthur, the young titan by TonnyGiant(6 parts)Viol Dom Giant Musc Grow  This is the story of how I met Arthur, and how he became a giant, and how he dominated everything and everyone ... and how he won my heart in respect and worship. And today I can say, we love each other.  Added Dec 2016  •  Updated Feb 2017  •  12.2K words
      21,468 views
    • Attil|a|rt by LAComplex  CGrow Viol Taller Giant Cock MGrow Musc Grow  The 15-foot phenomenon Attila pays a visit to the world-famous Michelangelo’s David statue, having decided to offer to the world a new reference for manliness and virility.  Added Mar 2019  •  7.0K words
      5,836 views
    • Augmentations by Also Known As(18 parts)CGrow Cock Scent MGrow Musc Grow Series  Pursuing a fantasy, a successful man hires an erotic partner who’s been augmented, but the kinds of pleasures his new lover can share with him are far beyond anything he’d imagined.  Added Jan 2014  •  98.8K words
      31,513 views
    • Away game by spacevlad(2 parts)MGrow Gut Musc PSD Grow  College freshman Adam is the smallest guy on the football team. On an away game road trip, he gets paired up to room with Wyatt, the biggest offensive lineman on the team. Adam tries to control himself as they are forced to share a bed, but Wyatt’s massive body is hard to resist.  Added Dec 2017  •  6.3K words
      18,092 views
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