Many geotechnical engineering constructions, including tunnels, sheet pile walls, bulkheads, earth retaining walls, and rail-road/highway abutments, rely on vertical plate anchors as their foundation. The vertical plate anchor resists the horizontal pullout force acting on these structures and imparts stability to these structures by restricting lateral movement. The influence of the aspect ratio (L/h ratio) of the vertical plate anchor embedded in the sand has been studied with the aid of the finite element method. The outcome shows that the non-dimensional breakout factor decreases with an increase in the aspect ratio up to 5 and thereafter marginal effect was noticed. Furthermore, the anchor capacity of a square plate anchor has also been studied, and found that the breakout factor decreases up to the size of 0.6 m × 0.6 m, and thereafter marginal reduction was observed and can be neglected.