Sandy soil is particularly susceptible to internal erosion, which can lead to serious structural failures in hydraulic and geotechnical systems. Stabilizing such soils is essential to mitigate these risks and enhance their engineering performance. This study investigates the use of crushed glass with cement to stabilize the sandy soil against internal erosion. Waste glass was crushed into three crashed glass gradation ranges: passing #40, passing #10 and retained on #40, and passing #3/4 and retained on #10. A 1:1 glass-to-cement ratio by weight was prepared and added to the sandy soil in different percentages. The internal erosion indices mainly the erosion rate index and critical shear were evaluated using Hole Erosion Test (HET). The specimens were remolded in the standard HET mold at 95% relative compaction and 1% above the optimum moisture content. The results demonstrated that the addition of crushed glass-cement mixture significantly improved the internal erosion resistance of both sand types; namely well graded sand (SW) and poorly graded sand (SP). For SW soil, 4% of the fine mixture increased the erosion rate index from 1.9 (very rapid erosion) to 5.9 (very slow), while SP soil achieved similar improvement at 6%. Correspondingly, critical shear stress increased with higher mixture content. Finer glass particles outperformed coarser glass in both erosion resistance and reduction of final hole diameter, highlighting the role of glass size in soil stabilization. The findings highlighted recycled glass as a viable stabilizer, with erosion resistance strongly influenced by particle size.