Ideal for mailing bulky items such as catalogues, reports, brochures and more, these Q-Connect envelopes feature an expanding 25mm gusset and durable, heavyweight 120gsm paper. The envelopes also feature a convenient address window measuring 40 x 105mm and a simple and strong peel and seal closure. Suitable for A4 documents, this pack contains 125 white C4 envelopes.