Pinstripes were a pattern of very thin stripes of any colour running in parallel often found in fashion.
The Tenth Doctor wore suits of pinstripe with notched lapels on the blazers; done on dark brown and light blue, (TV: The Christmas Invasion-The End of Time, The Day of the Doctor) or navy and crimson. (TV: Smith and Jones-Dreamland)
The Eleventh Doctor spent his first hours in the Tenth Doctor's brown and blue suit. (TV: The End of Time, The Eleventh Hour) He wore a burgundy pinstripe shirt under his first tweed blazer. (TV: The Eleventh Hour) He often wore a silver and ebony pinstripe shirt with his single-breasted frock coats. (TV: The Snowmen, Hide, The Time of the Doctor)
The War Doctor wore a bone pinstripe shirt during the Battle for the Tantalus Eye, (PROSE: Engines of War) and right up to his death after the 1562/2013 Zygon Invasion of Earth and the Fall of Gallifrey. (TV: The Day of the Doctor)
In his Sixth Doctor form, the Curator wore a double-breasted frock coat of burgundy and peach pinstripe with a cat brooch, and also trousers of chocolate and teal pinstripe. (AUDIO: The Artist at the End of Time)
Melanie Bush wore a peach and ivory pinstripe shirt when she and the Seventh Doctor foiled the First Rani. (TV: Time and the Rani)
During her time as CEO of A Charitable Earth, Ace wore a black and white pinstripe suit. (AUDIO: Quantum of Axos; TV: The Power of the Doctor) She also wore one when reuniting with the Seventh Doctor in the Memory TARDIS. (TV: The Curse of Fenric)
Sarah Jane Smith sometimes wore waistcoats of black pinstripe. (TV: The Stolen Earth|Journey's End, The Last Sontaran, The Day of the Clown, Enemy of the Bane, The Mad Woman in the Attic, The Eternity Trap, Goodbye, Sarah Jane Smith)
Rosita Farisi wore a steel blue pinstripe petticoat when she helped the Tenth Doctor and Jackson Lake foil Cybus Cybermen during the 1851 Incident. (TV: The Next Doctor)
Professor Jericho and Dan Lewis wore alabaster and steel pinstripe shirts during the early 1900s, the 2021 Sontaran Invasion of Earth, and the Flux. (TV: Survivors of the Flux|The Vanquishers)
Albert Dumfries, a senior member of the Cabinet of Harold Saxon, wore a black pinstripe suit up to when he was killed by the Saxon Master before the Toclafane Invasion of Earth. (TV: The Sound of Drums)
The Fifteenth Doctor wore a double-breasted blazer and trousers of Prussian blue pinstripe during a visit to London during 1963. (TV: The Devil's Chord)
Henry Van Statten wore a charcoal and white pinstripe shirt under a black blazer during the Van Statten Incident. (TV: Dalek)
John Lumic wore a blazer with notched lapels, a waistcoat and trousers of ebony pinstripe up to becoming a Controller of the Cybus Cybermen. (TV: Rise of the Cybermen|The Age of Steel)
The Half-Face Man wore charcoal pinstripe trousers during the 1890s. (TV: Deep Breath)
Diagoras wore a double-breasted blazer of raven black pinstripe as did Dalek Sec when he fused with him to become a Human Dalek during the Human Dalek Incident. (TV: Daleks in Manhattan/Evolution of the Daleks)
Grayle wore a double-breasted blazer and trousers of ebony pinstripe. (TV: The Angels Take Manhattan)
The Toymaker wore an alabaster and ebony pinstripe shirt. Shirley Bingham wore a blazer of steel blue pinstripe when she witnessed his defeat and the Fifteenth Doctor’s birth. (TV: The Giggle)