.packery-element { width: 150px; height: 150px; overflow: hidden; }

/* Examples widths and heights */

/*
.packery-element.wd1 { width: 200px; }
.packery-element.wd2 { width: 300px; }
.packery-element.wd3 { width: 400px; }

.packery-element.hg1 { height: 200px; }
.packery-element.hg2 { height: 300px; }
*/