Home / Large Format Advertising / Open Seam Banner Finishing Banner finishing Open Seam Banner Finishing Choose open-seam finishing when your banner needs an opening for a pole or support. Ask about this product The opening must accommodate the support. Share its dimensions and the position of the open seam so we can guide the finished banner size. Get a quote → Get help with print files or a template Full specifications & downloads Use the template for your chosen configuration. Bleed, cutting and mounting allowances can make artwork larger than the finished product.