Blake White Window Envelopes (250 Pack) Seal success with style! ✨ Crafted from premium 100gsm paper, these envelopes feature a secure peel & seal closure for effortless use and lasting protection. The 35x90mm window (18mm up, 19mm from left) is perfectly placed for professional presentation—ideal for business correspondence, letters, brochures, and more. With 250 envelopes in every pack, you’ll always be ready to send with confidence.
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