It's not your usual baby gift.

But Prime Minister Jacinda Ardern and her partner, Clarke Gayford, are not your usual expectant parents.

The couple have returned from their European tour with a cute and appropriate No.10 Downing Street onesie for their first child, due in June.

The tiny outfit was among six official gifts given to Prime Minister during her week-long visit to France, Germany and the United Kingdom this month.

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The Prime Minister definitely won in the gift stakes though — the onesie was the only gift to specifically acknowledge the pitter patter of little feet on the way for New Zealand's highest profile household.

The no.10 Downing St onesie given to Prime Minister Jacinda Ardern by her British counterpart, Theresa May, in London this month. Photo / Supplied
The no.10 Downing St onesie given to Prime Minister Jacinda Ardern by her British counterpart, Theresa May, in London this month. Photo / Supplied

The onesie, given by United Kingdom Prime Minister Theresa May, is white and has the number 10 on the front, the Prime Minister's office confirmed.

Ardern, who captured the attention of world media as only the second woman to fall pregnant while in office, also went home with household ware, photos and a desk set.

The latter, made out of Meißen porcelain, came from German Chancellor Angela Merkel.

French president Emmanuel Macron gave the Prime Minister a china plate.

The Queen, Prince Philip, Prince of Wales and the Duchess of Cornwall, whom Ardern met when she crossed the English channel for the Commonwealth Heads' of Government meeting, presented framed photographs of themselves.

Prime Minister Jacinda Ardern and her partner, Clarke Gayford, arrive at The Queen's Dinner during their European tour. Photo / REX/Shutterstock
Prime Minister Jacinda Ardern and her partner, Clarke Gayford, arrive at The Queen's Dinner during their European tour. Photo / REX/Shutterstock

From London mayor Sadiq Khan, Ardern received a set of etched glasses.

The hosts didn't miss out either.

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European leaders and their spouses received a variety of New Zealand gifts, from a pounamu mere for Macron and a Deadly Ponies scarf for Brigitte Macron to a sterling silver and dendritic pounamu brooch and a blunt umbrella for May and her husband Phillip.

Merkel was given a print of Dagmar Vaikalafi Dyck's "Home Grown". Dyck is a New Zealand artist of Tongan and German descent.

British Prime Minister Theresa May and New Zealand Prime Minister Jacinda Ardern outside 10 Downing Street this month. Photo / Vianney Le Caer/REX/Shutterstock
British Prime Minister Theresa May and New Zealand Prime Minister Jacinda Ardern outside 10 Downing Street this month. Photo / Vianney Le Caer/REX/Shutterstock

Other high-profile recipients included Khan, given the book Marae - Te Tatau Pounamu: A journey around New Zealand's meeting houses, and leader of the United Kingdom Labour Party, Jeremy Corbin, given a book on the history of the New Zealand Labour Party.

A hamper of artisan New Zealand food, including Omahu Valley marmalade and Lilly's High Country Pickle, was put together for the Queen.

And Prince Charles and the Duchess of Cornwall will be smiling after receiving his and hers New Zealand liquor.

His — Thompson South Island Single Malt Whiskey. Hers — Riot and Rose Gin.