flat cardboard

Fosmon 8.5 x 12 - #2 Christmas Holiday Poly Bubble Mailer Gift Wrap, Lightweight Water/Dust/Shock/Tear Resistant Padded Shipping Envelopes

JAM PAPER Extra Heavyweight 130lb Cardstock - 8.5 x 11 Coverstock - 352 gsm - Mint Green - 25 Sheets/Pack

DCWV Double-Sided Cardstock Stack 12"X12" 58/Pkg-Textured, White Core, 20 Colors/2-3 Each

Craft Consortium Double-Sided Paper Pad 12"X12" 30/Pkg-Metal Textures, 20 Designs

DCWV Single-Sided Cardstock Stack 12"X12" 48/Pkg-Far East 2, 24 Des/2 Each, 12 W/Foil

Hamilco Black Colored Cardstock Thick paper - with Envelopes - Flat 5 x 7" Heavy Weight 80 lb -100 Pack

Etokfoks 10 Pack Small Shipping Boxes 6x4x3 Inch Corrugated Cardboard Recyclable Packaging for Business Mailer Gift Crafts Jewelry Brown

Home Collection White Shimmer Metallic Cardstock Paper

DCWV Single-Sided Cardstock Stack 12"X12" 48/Pkg-Mariposa, 24 Designs/2 Each

Aitoh The Ancient Art Of Origami Kit-68 Sheets

40ct Winter Forest Kraft Letterhead Brown/Black: Christmas Stationery Paper, Matte Finish, 8.5x11 Inches, Unbound, 40 Sheets

80ct Making Friends Letterhead White

JAM Paper Circle Sticker Seals 1 2/3" 120ct

Prang® Construction Paper Smart Stack™ 11 Colors, 11 Assorted Colors, 9" x 12", 300 Sheets

DCWV Double-Sided Cardstock Stack 12"X12" 36/Pkg-Ocean Wonder, 18 Designs/2 Each

American Crafts Patterned Double-Sided Cardstock 12"X12"-Vintage Vibes, April And Ivy

supplyhut 25 5x7 Cardboard Corrugated Pads Inserts Filler Sheet 5 x 7

supplyhut 25 12x12 Cardboard Corrugated Pads Inserts Filler Sheet 12 x 12

UOFFICE Pack of 25 Corrugated Boxes 14" x 14" x 9" Cardboard Shipping Boxes