Hair clip device comprising: - a front element extending between a first extremity and a second extremity, along a development direction; said front element is devoid of lenses and/or of a nosepiece; - two lateral elements (13, 14) each provided with a free first end (13a, 14a) configured to rest on the base of a user's auricle; - at least one ornamental element (11a, 11b, 11c) which can be fixed to said front element in a removable way so as to be interchangeable; - articulation means fixed to said front element and to said lateral elements (13, 14) and configured to connect each of said lateral elements (13, 14) to one of said extremities (12a, 12b) of the front element so as to allow a rotation of said lateral elements (13, 14) with respect to said front element between an open position and a closed position; wherein in said closed position the lateral elements (13, 14) are arranged on top of each other and rest on the front element 12 so as to minimize the overall size of the hair clip device 10 - locking means configured to retain said lateral elements (13, 14) in said open position with respect to said front element; wherein said locking means comprise alternatively (a) first and second retaining elements (16, 17) or (b) a cantilever element; wherein for alternative (a) said first retaining elements are fixable or fixed to said lateral elements (13, 14) and said second retaining elements are fixable or fixed to said ornamental element (11a, 11b, 11c); said first and second retaining elements (16, 17) being positioned on said lateral elements (13, 14) and on said ornamental element (11a, 11b, 11c) in such a way that: - in said open position, said first retaining elements engage said second retaining elements; - in said closed position said first retaining elements and said second retaining elements are not operative and not engaged together; wherein for alternative (b) said cantilever element extends mainly, rectilinearly or substantially rectilinearly, along said development direction and wherein said cantilever element is integral with or removably fixable to a second extremity (13b, 14b) of said lateral elements (13, 14) or is integral with an additional component (18, 19) connectable to said lateral elements (13, 14) and said cantilever element is configured to overlap at least partially said ornamental element (11a, 11b, 11c) when said lateral elements (13, 14) are in said open position. - a front element extending between a first extremity and a second extremity, along a development direction; said front element is devoid of lenses and/or of a nosepiece; - two lateral elements (13, 14) each provided with a free first end (13a, 14a) configured to rest on the base of a user's auricle; - at least one ornamental element (11a, 11b, 11c) which can be fixed to said front element in a removable way so as to be interchangeable; - articulation means fixed to said front element and to said lateral elements (13, 14) and configured to connect each of said lateral elements (13, 14) to one of said extremities (12a, 12b) of the front element so as to allow a rotation of said lateral elements (13, 14) with respect to said front element between an open position and a closed position; wherein in said closed position the lateral elements (13, 14) are arranged on top of each other and rest on the front element 12 so as to minimize the overall size of the hair clip device 10 - locking means configured to retain said lateral elements (13, 14) in said open position with respect to said front element; wherein said locking means comprise alternatively (a) first and second retaining elements (16, 17) or (b) a cantilever element; wherein for alternative (a) said first retaining elements are fixable or fixed to said lateral elements (13, 14) and said second retaining elements are fixable or fixed to said ornamental element (11a, 11b, 11c); said first and second retaining elements (16, 17) being positioned on said lateral elements (13, 14) and on said ornamental element (11a, 11b, 11c) in such a way that: wherein said locking means comprise alternatively (a) first and second retaining elements (16, 17) or (b) a cantilever element; wherein for alternative (a) said first retaining elements are fixable or fixed to said lateral elements (13, 14) and said second retaining elements are fixable or fixed to said ornamental element (11a, 11b, 11c); said first and second retaining elements (16, 17) being positioned on said lateral elements (13, 14) and on said ornamental element (11a, 11b, 11c) in such a way that: - in said open position, said first retaining elements engage said second retaining elements; - in said closed position said first retaining elements and said second retaining elements are not operative and not engaged together;