Excepting the two original badges, once the order was formally founded, all the new members signed an undertaking to return the badges upon their death. After the order became obsolete, a number of badges continued to be returned before Kings Edward VII and his successors allowed family members to keep them.

Hence the first class badge of Queen Maude of Norway was given to granddaughter Princess Astrid, who wore it as bracelet, and recently gifted it to her great-niece. A number of these family members were also members of the Order, and if they were in the 2nd class and inherited a first class badge from their mother, permission was normally granted for them to wear the larger badge.

Examples we know of include HRH Princess Alice of Athlone, who started wearing her mother’s badge after HRH The Duchess of Albany’s death in 1922.

Here are some links to her wearing her original 2nd class badge
https://www.rct.uk/collection/2936159/princess-alice-and-princess-helen-of-albany shows Princess Alice with her mother, wearing their 1902 coronation robes.

in her 1911 coronation robes.

Here are some links to her wearing the 1st class badge post-1922

Princess Alice of Athlone items in Toronto Public Library collection

including at the opening of the Canadian Parliament during her husband’s term as Governor General.

(I’m sure I read somewhere that after Princess Alice’s death her daughter Lady May Abel Smith inherited her mother’s royal orders insignia and had the crowns removed so she could wear the jewelled cameos as brooches. I must follow that up. Does anyone readily know of a source?)