Mayday Games 63.5 x 88mm Premium Sleeves - Arctic Board Games

Yes these are "Standard" size card sleeves.  They are specifically designed to fit 63.5 X 88 MM cards but the external dimensions of the sleeves are

Phantom Sleeves: Gray Size 64 x 88mm: Glossy Front/Back - 50 Pack - Transparent Protective Card Sleeves for Board Games, Trading Cards & Card Games : Toys & Games

Mayday Games Card Game Sleeves 63.5mm x 88mm and 65mm x 100mm -Choose your color

Sleeve Kings 60 Micron Standard Card Sleeves for Board Games by Imperial Publishing Inc — Kickstarter

Protection Sleeves

Phantom Sleeves: Gray Size 64 x 88mm: Glossy Front/Back - 50 Pack - Transparent Protective Card Sleeves for Board Games, Trading Cards & Card Games : Toys & Games

Cthulhu: Death May Die - Black Goat of the Woods

Arctic Scavengers: Base Game+HQ+Recon, Board Game

50 x Clear Standard Card Sleeves 63.5mm x 88mm (Mayday Premium)

Mayday Games – Legendesque

Sleeves

All Card Sleeves by Size

Mayday Games - Noble Knight Games