Just as @Drew states. I use this:
(defconst frame-default-top 0 "The 'top' position property of a frame.")
(defconst frame-default-left 0 "The 'left' position property of a frame.")
(defconst frame-default-height 60 "The default frame height.")
(defconst frame-default-width 188 "The default frame width.")
(add-to-list 'default-frame-alist (cons 'left frame-default-left))
(add-to-list 'default-frame-alist (cons 'top frame-default-top))
(add-to-list 'default-frame-alist (cons 'height frame-default-height))
(add-to-list 'default-frame-alist (cons 'width frame-default-width))
If you want only the initial frame use initial-frame-alist. I set both which is probably overkill.
(add-to-list 'initial-frame-alist (cons 'left frame-default-left))
(add-to-list 'initial-frame-alist (cons 'top frame-default-top))
(add-to-list 'initial-frame-alist (cons 'height frame-default-height))
(add-to-list 'initial-frame-alist (cons 'width frame-default-width))