jQuery UI Resizable - Snap to grid
#resizable { width: 150px; height: 150px; padding: 0.5em; }
#resizable h3 { text-align: center; margin: 0; }
$(function() {
$("#resizable").resizable({
grid: 50
});
});
Grid
Snap the resizable element to a grid. Set the dimensions of grid cells (height and width in pixels) with the grid option.