The Australian Olympic Committee (AOC) on Tuesday unveiled the uniform for Tokyo 2021, which includes a jacket featuring the names of the nation's 320 Olympic gold medallists in its lining.

"I think they look fantastic; they look very classy - I think it's wonderful to see the colours transition from previous uniforms as well," Barber, who will compete in javelin, said.

"You essentially have champions on your shoulders following you into the Games.

"It is wonderful in terms of the memories of those Games, the memories of the people and their achievements more than anything.

"It should really light a fire into all our Olympians wearing that blazer."

The uniform reveal made everything more real for Barber, after the Games were postponed from last year due to the pandemic.

She won the world championship in Doha in 2019 with a throw of 66.56 metres and will be one of the favourites in Tokyo to win Olympic gold.

"I am really starting to zone in and focus on what I aim to achieve," Barber said.

But how many athletes, if any, will wear the uniform while marching at Japan National Stadium during the opening ceremony on July 23?

The answer should come in June, when other issues like crowd numbers will also be addressed in the latest update on biosecurity protocols.

"What the opening ceremony is going to look like is still one of the great unknowns," Australia's Chef de Mission Ian Chesterman said.

"There's a lot of unknowns, we have to be patient ... I've been very up front with the athletes throughout every step since the postponement.

"Yes, everyone loves an opening ceremony, but the athletes are going to Tokyo to compete and that's their major focus."

Rather than arrive and depart Tokyo en masse, Australia's group of approximately 450-480 Olympians will fly in and out for their specific competition to help minimise the risk of COVID-19 transmission.

"It's always a relatively small number of the entire Australian team who march, that's something that is not always fully understood," Chesterman said.

"Our Olympians have done their own thing in the past, I've heard about sailors marching around the village they were in at Rio and other examples.

"Everyone will get the uniform on, make a moment of it then focus on the main game."

National 400m champion Bendere Oboya, who is aged 21 and will be competing at her first Olympics, isn't fussed.

"Marching would be a memorable occasion but if not, I'll still just be grateful to be there and know that I'm competing in the next couple of days and putting on an Australian uniform," Oboya said.

Taekwondo fighter Safwan Khalil, who represented Australia at London 2012 and Rio 2016, noted everybody had to be open minded about "everything that is going to happen in Tokyo".

"Hopefully we can march," Khalil said. "If not, I'll rock the kit in my room and do a couple of laps around and have a laugh with whoever is there."