What to wear to sister’s graduation??

[hazeydays14]

My sister is graduating this month. She wants my mum and I to have a professional photo with her so I want to make the effort but not go OTT. She wore quite a formal dress to my graduation but her and my mum sort of co-ordinated with similar styles.

I have no idea what to wear! If it was summer I’d wear a trusty floral midi .

5’5, size 10, very bottom heavy 😂

something like this maybe? www.debenhams.com/webapp/wcs/stores/servlet/prod_10701_10001_65075+1052?brand=Grace&cat1=Women&cat2=Dresses&CMP=SSH_2826109765_1049930151_50710504279&gclid=EAIaIQobChMIncr2yfXq3QIVggvTCh2ZPwxXEAkYECABEgIS8PD_BwE&gclsrc=aw.ds