Square Envelopes

Shop square envelopes in best-selling 150 × 150 mm and 155 × 155 mm, plus 100, 120, 130 and 140 mm sizes for wedding invitations, greetings cards and premium mailers. Choose premium white, natural manilla or vibrant colours with window-free faces for a clean presentation, and pick gummed, self seal or peel & seal closures. Heavier gsm and ultra-opaque options protect foiled cards and photographs. Use filters to refine by size, colour and seal, and save with box, outer and pallet pricing for regular post. Orders dispatch quickly from our UK warehouse with free UK delivery when you spend £50+. Need more capacity or protection? Pair with gusset or board back styles to keep corners crisp and contents flat.

Showing 176 products
Pale Pink Gummed V-Flap 120gsm Envelope (130 x 130mm)
Pale Pink Gummed V-Flap 120gsm Envelope (130 x 130mm)
£0.20 £0.25
On Sale
£0.20 £0.25
Dark Green Gummed V-Flap 120gsm Envelope (130 x 130mm)
Dark Green Gummed V-Flap 120gsm Envelope (130 x 130mm)
£0.20 £0.25
On Sale
£0.20 £0.25
White Luxury 180gsm Peel & Seal Envelope (190 x 190mm)
White Luxury 180gsm Peel & Seal Envelope (190 x 190mm)
£0.34
£0.34
Magnolia Peel & Seal 120gsm Envelope (155 x 155mm)
Magnolia Peel & Seal 120gsm Envelope (155 x 155mm)
£0.34
£0.34
Dark Blue Gummed V-Flap 120gsm Envelope (155 x 155mm)
Dark Blue Gummed V-Flap 120gsm Envelope (155 x 155mm)
£0.29 £0.35
On Sale
£0.29 £0.35
Kraft V-Flap Envelope & Kraft Card Pack
Kraft V-Flap Envelope & Kraft Card Pack
£4.60
£4.60
Pale Blue Gummed V-Flap 120gsm Envelope (155 x 155mm)
Pale Blue Gummed V-Flap 120gsm Envelope (155 x 155mm)
£0.29 £0.35
On Sale
£0.29 £0.35
Flame Orange British Made 100gsm Gummed V-Flap Envelope (155 x 155mm)
Flame Orange British Made 100gsm Gummed V-Flap Envelope (155 x 155mm)
£0.16
£0.16
Folded Card Blanks
Folded Card Blanks
From £0.21
£0.40
Bright Red Gummed V-Flap 120gsm Envelope (155 x 155mm)
Bright Red Gummed V-Flap 120gsm Envelope (155 x 155mm)
£0.29 £0.35
On Sale
£0.29 £0.35
Dark Green Peel & Seal 120gsm Envelope (155 x 155mm)
Dark Green Peel & Seal 120gsm Envelope (155 x 155mm)
£0.34 £0.41
On Sale
£0.34 £0.41
Fuschia Pink 100gsm Gummed V-Flap Greeting Card Envelope (130 x 130mm)
Fuschia Pink 100gsm Gummed V-Flap Greeting Card Envelope (130 x 130mm)
£0.30 £0.36
On Sale
£0.30 £0.36
Silver Coloured Peel & Seal 120gsm Envelope (155 x 155mm)
Silver Coloured Peel & Seal 120gsm Envelope (155 x 155mm)
£0.30
£0.30
Mid Yellow Gummed V-Flap 120gsm Envelope (155 x 155mm)
Mid Yellow Gummed V-Flap 120gsm Envelope (155 x 155mm)
£0.25 £0.30
On Sale
£0.25 £0.30
Mid Yellow Gummed V-Flap 120gsm Envelope (140 x 140mm)
Mid Yellow Gummed V-Flap 120gsm Envelope (140 x 140mm)
£0.25
£0.25
Black Gummed V-Flap 120gsm Envelope (116 x 116mm)
Black Gummed V-Flap 120gsm Envelope (116 x 116mm)
£0.19
£0.19
Pale Grey Gummed V-Flap 120gsm Envelope (155 x 155mm)
Pale Grey Gummed V-Flap 120gsm Envelope (155 x 155mm)
£0.29 £0.35
On Sale
£0.29 £0.35
Mid Blue Peel & Seal 120gsm Envelope (155 x 155mm)
Mid Blue Peel & Seal 120gsm Envelope (155 x 155mm)
£0.34 £0.41
On Sale
£0.34 £0.41
Fuschia Pink 100gsm Gummed Greeting Card Envelope (155 x 155mm)
Fuschia Pink 100gsm Gummed Greeting Card Envelope (155 x 155mm)
£0.30 £0.36
On Sale
£0.30 £0.36
Dark Red Gummed V-Flap 120gsm Envelope (130 x 130mm)
Dark Red Gummed V-Flap 120gsm Envelope (130 x 130mm)
£0.25
£0.25
Gold Gummed V-Flap 120gsm Envelope (155 x 155mm)
Gold Gummed V-Flap 120gsm Envelope (155 x 155mm)
£0.35
£0.35
Dark Red Gummed V-Flap 120gsm Envelope (140 x 140mm)
Dark Red Gummed V-Flap 120gsm Envelope (140 x 140mm)
£0.29
£0.29
White Envelope (220 x 220mm)
White Envelope (220 x 220mm)
£0.41 £0.50
On Sale
£0.41 £0.50
Oyster 90gsm Gummed V-Flap Greeting Card Envelope (155 x 155mm)
Oyster 90gsm Gummed V-Flap Greeting Card Envelope (155 x 155mm)
£0.39 £0.47
On Sale
£0.39 £0.47
Bright Blue Gummed V-Flap 120gsm Envelope (140 x 140mm)
Bright Blue Gummed V-Flap 120gsm Envelope (140 x 140mm)
£0.24 £0.29
On Sale
£0.24 £0.29
Black Gummed V-Flap 120gsm Envelope (140 x 140mm)
Black Gummed V-Flap 120gsm Envelope (140 x 140mm)
£0.31
£0.31
Dark Yellow Gummed V-Flap 120gsm Envelope (155 x 155mm)
Dark Yellow Gummed V-Flap 120gsm Envelope (155 x 155mm)
£0.29 £0.35
On Sale
£0.29 £0.35
White Hammer 100gsm Gummed V-Flap Envelope (130 x 130mm)
White Hammer 100gsm Gummed V-Flap Envelope (130 x 130mm)
£0.25 £0.30
On Sale
£0.25 £0.30
Fuschia Pink 100gsm Gummed V-Flap Greeting Card Envelope (140 x 140mm)
Fuschia Pink 100gsm Gummed V-Flap Greeting Card Envelope (140 x 140mm)
£0.24 £0.29
On Sale
£0.24 £0.29
Metallic Gold 100gsm Gummed V-Flap Greeting Card Envelope (140 x 140mm)
Metallic Gold 100gsm Gummed V-Flap Greeting Card Envelope (140 x 140mm)
£0.31
£0.31
White V-Flap Envelope & Smooth Card Pack
White V-Flap Envelope & Smooth Card Pack
£4.60
£4.60
Magnolia Gummed V-Flap 120gsm Envelope (130 x 130mm)
Magnolia Gummed V-Flap 120gsm Envelope (130 x 130mm)
£0.20
£0.20
White 120gsm Gummed Greeting Card Envelope (175 x 175mm)
White 120gsm Gummed Greeting Card Envelope (175 x 175mm)
£0.16
£0.16
Mid Yellow Gummed V-Flap 120gsm Envelope (130 x 130mm)
Mid Yellow Gummed V-Flap 120gsm Envelope (130 x 130mm)
£0.20
£0.20
Black British Made 100gsm Gummed V-Flap Envelope (155 x 155mm)
Black British Made 100gsm Gummed V-Flap Envelope (155 x 155mm)
£0.25
£0.25
Salmon Pink Gummed V-Flap 120gsm Envelope (130 x 130mm)
Salmon Pink Gummed V-Flap 120gsm Envelope (130 x 130mm)
£0.20
£0.20
Pale Grey Gummed V-Flap 120gsm Envelope (130 x 130mm)
Pale Grey Gummed V-Flap 120gsm Envelope (130 x 130mm)
£0.20
£0.20
Bright Red Gummed V-Flap 120gsm Envelope (140 x 140mm)
Bright Red Gummed V-Flap 120gsm Envelope (140 x 140mm)
£0.25 £0.31
On Sale
£0.25 £0.31
Pink Gummed V-Flap 120gsm Envelope (140 x 140mm)
Pink Gummed V-Flap 120gsm Envelope (140 x 140mm)
£0.25 £0.31
On Sale
£0.25 £0.31
Orange Gummed V-Flap 120gsm Envelope (140 x 140mm)
Orange Gummed V-Flap 120gsm Envelope (140 x 140mm)
£0.29
£0.29
White Luxury 180gsm Peel & Seal Envelope (249 x 249mm)
White Luxury 180gsm Peel & Seal Envelope (249 x 249mm)
£0.50 £0.61
On Sale
£0.50 £0.61
Mid Yellow Peel & Seal 120gsm Envelope (155 x 155mm)
Mid Yellow Peel & Seal 120gsm Envelope (155 x 155mm)
£0.34 £0.41
On Sale
£0.34 £0.41
White Self Seal 100gsm Window Envelope (220 x 220mm)
White Self Seal 100gsm Window Envelope (220 x 220mm)
£0.25 £0.30
On Sale
£0.25 £0.30
Magnolia Gummed V-Flap 120gsm Envelope (155 x 155mm)
Magnolia Gummed V-Flap 120gsm Envelope (155 x 155mm)
£0.29 £0.35
On Sale
£0.29 £0.35
Orange Peel & Seal 120gsm Envelope (155 x 155mm)
Orange Peel & Seal 120gsm Envelope (155 x 155mm)
£0.41
£0.41
Orange Gummed V-Flap 120gsm Envelope (155 x 155mm)
Orange Gummed V-Flap 120gsm Envelope (155 x 155mm)
£0.29
£0.29
White 90gsm Gummed V-Flap Envelope (155 x 155mm)
White 90gsm Gummed V-Flap Envelope (155 x 155mm)
£0.29 £0.35
On Sale
£0.29 £0.35
White Luxury 180gsm Peel & Seal Envelope (140 x 140mm)
White Luxury 180gsm Peel & Seal Envelope (140 x 140mm)
£0.23
£0.23