What's the Difference…

between dwarfs and dwarves? (No, not just the spelling. Nor the pronunciation, neither.)

Velázquez – Bufón don Sebastián de Morra (Museo del Prado, c. 1645)
And to which group does the above gentleman belong?

Slippers

Do you wear slippers? What kind?

Tofflor tillhörande Thérèse - Livrustkammaren - 83959Carpet slippers? Knitted slippers? Furry slippers? Novelty slippers? Glass, like Cinderella?
And if it can be told, how long have you had them – and how are they holding up?