Sheldon's Brown De Oxy Ribo T-Shirt From Big Bang Theory

This brown De Oxy Ribo T-Shirt was worn by Sheldon in Season 2, Episode 23 (The Monopolar Expedition)

Sheldon's Purple Nanotubes T-Shirt From Big Bang Theory

This purple Nanotubes T-Shirt was worn by Sheldon in Season 2, Episode 19 (The Dead Hooker Juxtaposition), Season 3, Episode 11 (The Maternal Congruence), and Season 5, Episodes 15 (The Vacation Solution) and 22 (The Stag Convergence)

Sheldon's Black Quantum T-Shirt From Big Bang Theory

This black Quantum T-Shirt was worn by Sheldon in Season 3, Episode 9 (The Vengeance Formulation)

Sheldon's Light Blue Atmospheric CO2 T-Shirt From Big Bang Theory

This light blue Atmospheric CO2 T-Shirt was worn by Sheldon in Season 3, Episode 10 (The Gorilla Experiment) and Season 4, Episode 4 (The Hot Troll Deviation)

Sheldon's Blue Screens and Lenses Work Magic T-Shirt From Big Bang Theory

This "Screens and Lenses Work Magic." t shirt was worn by Sheldon in Season 5, Episodes 10 (The Flaming Spittoon Acquisition) and 23 (The Launch Acceleration)

Sheldon's Black Astrosmash Video Game T-Shirt From Big Bang Theory

This black Intellivision Astrosmash  Video Game T-Shirt was worn by Sheldon in Season 3, Episode 15 (The Large Hadron Collision) and Season 5, Episodes 11 (The Shiny Trinket Maneuver) and 21 (The Hawking Excitation)

Sheldon's Indigo Mow Em Down T-Shirt From Big Bang Theory

This indigo mow em down t shirt was worn by Sheldon in Season 2, Episode 12 (The Killer Robot Instability), in which episode they created the robot.

Sheldon's Red Lantern Corps Symbol T-Shirt From Big Bang Theory

This red lantern corps symbol shirt was worn by Sheldon in Season 3, Episode 17 (The Precious Fragmentation)

Sheldon's Blue Ames Bros Destroyer T-Shirt From Big Bang Theory

This blue Ames Bros destroyer t shirt was worn by Sheldon in Season 2, Episodes 8 (The Lizard-Spock Expansion) and 18 (The Work Song Nanocluster)

Sheldon's Dark Blue 73 T-Shirt T-Shirt From Big Bang Theory

This dark blue 73 t shirt was worn by Sheldon in Season 4, Episode 13 (The Thespian Catalyst) and Season 5, Episode 6 (The Rhinitis Revelation)

Sheldon's Vintage Blue Flash Ray Gun T-Shirt From Big Bang Theory

This vintage blue flash ray gun t shirts was worn by Sheldon in Season 2, Episode 12 (The Killer Robot Instability) and Season 3, Episode 1 (The Electric Can Opener Fluctuation)

Sheldon's Gray Justice League II T-Shirt From Big Bang Theory

This gray Justice League II T-Shirt is from big bang theory ,was worn by Sheldon in Season 1, Episode 16 (The Peanut Reaction), Season 3, Episode 23 (The Lunar Excitation) and Season 5, Episodes 5 (The Russian Rocket Reaction) and 21 (The Hawking Excitation)

Sheldon's Green Lantern Equation T-Shirt From Big Bang Theory

This dark green latern equation t shirts was worn by Sheldon in Season 5, Episode 23 (The Launch Acceleration)

Sheldon's Orange Aquaman T-Shirt From Big Bang Theory

This orange aquaman tshirts worn by Sheldon in Season 3, Episode 15 (The Large Hadron Collision), Season 4, Episode 6 (The Irish Pub Formulation), and Season 5, Episode 12 (The Recombination Hypothesis)

Sheldon has worn this in orange and brown.

Sheldon's Orange Flash Lightning T-Shirt From Big Bang Theory

This orange Flash Lightning T-Shirt was worn by Sheldon in Season 3, Episode 19 (The Wheaton Recurrence) and Season 4, Episode 5 (The Desperation Emanation)

Sheldon's Black Flash T-Shirt T-Shirt From Big Bang Theory

This black flash logo shirts was worn by Sheldon in Season 3, Episode 22 (The Staircase Implementation) and Season 5, Episodes 13 (The Beta Test Initiation) and 19 (The Weekend Vortex)

Sheldon's Yellow Hawkman T-Shirt From Big Bang Theory

This yellow hawkman t shirts was worn by Sheldon in Season 3, Episode 22 (The Staircase Implementation), Season 4, Episode 6 (The Irish Pub Formulation) and Season 5, Episode 14 (The Friendship Contraction). It could be bought from amazon now:

Sheldon's Green Lantern Flying X T-Shirt From Big Bang Theory

This Green Lantern Flying X T-Shirt was worn by Sheldon in in Season 3, Episode 22 (The Staircase Implementation) and Season 4, Episode 4 (The Hot Troll Deviation).

Sheldon's Red Flash Hyper Run T-Shirt From Big Bang Theory

This red flash hyper speed t shirts was worn by Sheldon in in Season 4, Episode 7 (The Apology Insufficiency), when he and penny run together . 

Sheldon's Red Distressed Flash T-Shirt From Big Bang Theory

This red flash logo t shirt was worn by Sheldon in cheese cake factory , when they all going to seminar.