I pondered this question before and found this. Hope it helps!
The Catholic Encyclopedia lists 18 small scapulars approved by the Church:[47]
The White Scapular of the Most Blessed Trinity (1193)
The White Scapular of Our Lady of Ransom (1218)
The Brown Scapular of Our Lady of Mount Carmel (1250)
The Black Scapular of the Seven Dolours of Mary (1255)
The Blue Scapular of the Immaculate Conception
The Red Scapular of the Most Precious Blood
The Black Scapular of the Passion (1720)
The Red Scapular of the Passion (1846)
The Black Scapular of Help of the Sick (1860)
The White Scapular of the Immaculate Heart of Mary (1877)
The Blue and Black Scapular of St. Michael the Archangel (1880)
The Scapular of St. Benedict (1882)
The Scapular of the Holy Face (1885)
The White Scapular of the Our Lady of Good Counsel (1893)
The White Scapular of St. Joseph (1898)
The White Scapular of The Most Sacred Heart of Jesus (1900)
The Scapular of the Sacred Hearts of Jesus and Mary (1901)
The White Scapular of St. Dominic (1903)