of one quarter to one and one half inch wider than the outer diameter of flange 12 generally the annular holes are about one half inch wider than the outer diameter of the flange 12 if a hole 14 is to be used for receiving a golf cup insert 10 inserted from the top of the hole then the hole 14 has a molded integral annular lock ring 38 with multiple locking slots 40 as shown in fig3 the golf cup insert 10 shown in fig2 is dropped into hole 14 so that an arch 46 passes through slot 40 and flange 12 rests on lock ring 38 as shown in fig4 the golf ball cup insert 10 is turned to prevent the cup insert 10 from being pulled upward from hole 14 the flange 12 will be flush with top surface 36 of the polymeric panel 16 a space 50 between the outer edge 52 of flange 12 of about one quarter inch permits movement of cup insert 10 such movement can be caused by stretching or expansion of synthetic turf 18 pressing against vertical edge 22 as seen in fig6 if the synthetic turf 18 expands its edge 42 is accommodated by opening 44 in an inside surface 54 of bump rail 20 as shown in fig8 a typical movement of golf cup insert 10 is shown in fig5 by.