Oppenheimer Hat Guide

The Oppenheimer hat, also known as the fedora, is a classic hat style that has stood the test of time. Originally worn by men in the 1920s and 1930s, the hat has a sophisticated look. Recently, the hat has been made famous by Christopher Nolan’s 2023 film Oppenheimer. Cillian Murphy plays the role of the nuclear scientist Robert Oppenheimer and is seen wearing the hat in the movie and promotional material.

The hat has made a comeback in recent years as a fashion statement for both men and women. Its unique design combines fashion and functionality, making it a must-have accessory in any wardrobe.

robert oppenheimer hat
The real Robert Oppenheimer wearing his signature hat

What is the Oppenheimer hat?

The Oppenheimer hat is a soft-brimmed hat with a creased crown and pinched front. It is usually made of wool or felt and is available in various colors, although the most popular color is black.

The hat has a wide ribbon band around the base of the crown and a single feather or quill on the side.

Why is it called the Oppenheimer hat?

The hat is named after Robert Oppenheimer, the physicist who played a key role in the development of the atomic bomb.

Oppenheimer was known for wearing a fedora hat, and the style became associated with him.

Actor Cillian Murphy portrays Robert Oppenheimer in the 2023 film Oppenheimer.
Credit: Univeral Pictures

The Oppenheimer Movie

In the 2023 biographical drama film titled “Oppenheimer,” directed by Christopher Nolan, actor Cillian Murphy portrays the renowned physicist J. Robert Oppenheimer, who played a crucial role in the development of the atomic bomb during World War II.

The film was released on Friday, July 21st to universal critical acclaim. It currently holds a 94% certified fresh rating on Rotten Tomatoes. Audience reception has been equally positive with 94% fresh: a stunning feat for a 3-hour-long film.

History of the Oppenheimer Hat

The Oppenheimer hat has a rich history that dates back to the early 20th century. Here are some interesting facts about the history of the hat:

  • The hat became popular in the 1920s and 1930s as a symbol of sophistication and class.
  • It was initially worn by men, but women started to wear it as well in the 1940s and 1950s.
  • The Oppenheimer hat was worn by famous figures such as Humphrey Bogart, Frank Sinatra, and Indiana Jones.
  • The hat lost popularity in the 1960s and 1970s but made a comeback in the 1980s and 1990s as a fashion accessory.
Image Credit: Universal Pictures

The Oppenheimer Hat Today

Today, the Oppenheimer is a popular fashion accessory that can be worn by both men and women. Here are some reasons why the hat remains popular:

Fashion Statement

The Oppenheimer hat is a fashion statement that adds a touch of class and sophistication to any outfit. It can be worn with casual or formal attire and complements any style.

Sun Protection

The Oppenheimer provides sun protection, making it a great accessory for outdoor activities.

The wide brim provides shade and protects the face and neck from the sun’s harmful UV rays.


The hat is a versatile accessory that can be worn in different seasons and occasions.

It can be paired with a coat and scarf in the winter or with a summer dress in the warmer months. It is also a popular accessory for weddings, parties, and other formal events.


The Oppenheimer hat is not only fashionable but also functional. It can keep the head warm in cold weather and protect the hair from wind and rain.

It is also a useful accessory for travelers, as it can be easily packed in a suitcase and worn on the go.

Styling the Oppenheimer Hat

The Oppenheimer can be styled in different ways to suit different outfits and occasions. Here are some tips for styling the hat:

Casual Look

Pair the Oppenheimer with a denim jacket, t-shirt, and jeans for a casual and cool look. Add some boots or sneakers to complete the outfit.

Formal Look

Wear the Oppenheimer with a suit or a dress for a formal event. Choose a black or dark-colored hat to match the attire.

Vintage Look

Pair the Oppenheimer with a vintage coat or dress for a retro-inspired look. Add some heels or oxfords to complete the outfit.


The Oppenheimer is a timeless classic that has made a comeback in recent years as a popular fashion accessory. Its unique design combines fashion and functionality, making it a must-have accessory in any wardrobe.

Whether you’re looking for sun protection or a stylish addition to your outfit, this hat is a versatile accessory that can be worn in different seasons and occasions. So why not add an Oppenheimer to your collection today?


What kind of hat does Oppenheimer wear?

The Oppenheimer hat has been described as a mixture between the porkpie and fedora by the film’s costume crew.

What is the difference between a fedora and a pork pie hat?


  • Brim: The fedora typically has a wide brim that extends around the entire circumference of the hat. The brim can be snapped down in the front, turned up in the back, or shaped to the wearer’s preference.
  • Crown: The crown of a fedora is usually creased lengthwise down the center and has a gentle indentation.
  • Style: Fedoras often have a classic, sophisticated, and timeless appearance. They are versatile and can be dressed up or down depending on the outfit.

Porkpie Hat:

  • Brim: The porkpie hat has a narrow, flat brim that goes all the way around the hat. The brim is often turned up at the edges, creating a distinct silhouette.
  • Crown: The crown of a porkpie hat is shorter and flatter compared to the fedora, with a circular shape resembling the top of a pork pie pastry, which gives the hat its name.
  • Style: Porkpie hats are known for their unique and slightly edgy style. They are often associated with jazz musicians and have a more modern and casual feel compared to fedoras.

Fedoras and porkpie hats differ in the width and shape of the brim as well as the design of the crown. Fedoras have a wider brim and a creased crown, while porkpie hats have a narrow, flat brim and a shorter, rounder crown.

What did Oppenheimer say to Einstein?

Oppenheimer said, “I believe we did” to Einstein. He believes he is responsible for setting in motion a chain of events that could destroy the universe. This describes why Oppenheimer quoted the Bhagavad Gita when he said, “Now I Am Become Death, the Destroyer of Worlds.

Can women wear the Oppenheimer hat?

Yes, the hat can be worn by both men and women.

What is the difference between a fedora and an Oppenheimer hat?

The hat is a type of fedora, with a pinched front and creased crown.

How do I choose the right size Oppenheimer hat?

Measure the circumference of your head with a measuring tape, just above your eyebrows and ears. Consult a size chart to find the right size hat for your head measurement.

Can I wear the Oppenheimer hat in the summer?

Yes, the hat can be worn in the summer for sun protection. Choose a lighter-colored hat and a breathable material like straw.

How do I care for my hat?

Brush the hat regularly to remove dust and dirt. Store the hat in a cool and dry place, away from direct sunlight.

Where can I buy an Oppenheimer hat?

Hats can be found at specialty hat stores, department stores, and online retailers.