referring specifically to fig1 an unfolded exterior watch carton in accordance with the present invention is depicted . an unassembled watch carton 100 includes a base 12 , sidewalls 4 , a front wall 6 and a rear wall 8 . front wall 6 is hingedly connected to two of sidewalls 4 at front wall hinge lines 32 . rear wall 8 is hingedly connected to one of sidewalls 4 at rear wall hinge line 34 . also included are a lid 10 hingedly connected to rear wall 8 at lid hinge line 22 and a front lid flap 16 hingedly connected to lid 10 at flap hinge line 28 . side walls 4 are hingedly attached to support tabs 24 which fold over tab hinge lines 26 . in addition , two lid tabs 14 are hingedly attached to sidewalls 4 at lid tab hinge lines 40 . base 12 is hingedly connected to front wall 6 at base hinge line 38 . a base flap 42 is hingedly connected to base 12 at base flap hinge line 30 . in order to form assembled carton 100 , as illustrated in fig3 rear wall 8 folds over hinge line 34 and sidewalls 4 fold over front wall hinge lines 32 to form carton 100 . rear wall edge 36 is fixed ( e . g . glued ) to one of sidewalls 4 to maintain the shape of assembled carton 100 . base 12 is folded over base hinge line 38 . in addition , lid tabs 14 are folded over lid tab hinges 40 . thereafter , lid 10 is folded over lid hinge line 22 to facilitate the closing of assembled carton 100 . referring specifically to fig2 a support insert 50 is adapted for insertion in carton 100 . unassembled support insert 50 includes a support base 54 and a similar pair of sidewall supports 52 . support base 54 includes a pair of tab cut - outs 56 therein . support base 54 is hingedly attached to sidewall supports 52 at support hinge lines 58 . sidewall supports 52 are folded toward support base 54 so that they are orthogonal to support base 54 . the assembled carton with interior support insert therein are depicted in fig4 and 5 . support insert 50 is inserted into carton 100 before base 12 is folded over hinge line 38 . support base 54 corresponds to and aligns with base 12 and sidewall supports 52 correspond to and align with each of sidewalls 4 . support base 54 is secured in position in carton 100 by the cooperation of support tabs 24 and tab cut - outs 56 in support base 54 . support tabs 2 interlock with tab cut - outs 56 to secure support insert 50 in position inside carton 100 . support base 54 can be removed from carton 100 by removing support tabs 24 from tab cut - outs 56 . referring specifically to fig6 an embodiment of exterior watch carton 100 is disclosed having a smaller interior but the same exterior as fig4 to exemplify the varying interior feature . support base 54 &# 39 ; corresponds to and aligns with base 12 and side wall supports 52 &# 39 ; correspond to and align with each of side walls 4 . side wall supports 52 &# 39 ; are thicker than side wall supports 52 , and therefore can vary the interior volume of carton 100 . similar to the embodiment of fig4 support base 54 &# 39 ; is secured in position in carton 100 by the cooperation of support tabs 24 and tab cut - outs 56 &# 39 ; in support base 54 &# 39 ;. from the foregoing it will be apparent that in the assembled condition of the two components , namely carton 100 with interior support insert 50 , that sidewall supports 52 are substantially coextensive with their companions sidewall 4 of exterior carton 100 and interfit therewith in substantial planar engagement so as to reinforce sidewalls 4 against exterior forces while providing for easy removal by disengagement of support tabs 24 from their companion tab cut - outs 56 . it will thus be seen that the objects set forth above , among those made apparent from the preceding description , are efficiently attained and , since certain changes may be made in the above constructions without departing from the spirit and scope of the invention , it is intended that all matter contained in the above description o shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense . it is also to be understood that the following claims are intended to cover all of the generic and specific features of the invention herein described and all statements of the scope of the invention which , as a matter of language , might be said to all therebetween .