Specialty retailer of large-size women's fashions and footwear, United Retail Group Inc, has posted a 14 per cent jump in March sales to $44.6 million from the year-ago period. Comparable store sales increased 10 per cent for the month, while for the fiscal first quarter-to-date, total sales climbed 12 per cent to $75.7m and like-for-like sales are up nine per cent.