Some other off the shoulder favorites here:

Off Shoulder Sundress With Tiered Skirt In Rainbow Stripe (ASOS)

Stripe Checked 80s One Shoulder Prom Dress (ASOS)

Lemon Print Bardot Cold Shoulder Dip Back Midi Prom Dress (ASOS)

Peek & Beau Bardot Polka Dot Swimsuit (ASOS)

About my outfit:

Dress: ASOS

Bag: Mansur Gavriel

Heels: Last season, similar here

Sunnies: Loft, last seen here