Hoodman eyecups regular size and glasses size for Nikon Z9 – Hoodman Corporation
Amazon.com : Foto&Tech Rubber Eyecup for Glasses Eyecup Eyeshade EF Compatible with Canon 90D 80D 70D 60D 77D 6D Mark II 5D Mark II T7 T6 T5 T100 T8i T7i T6s T6i
Nikon DK-32 Rubber Eyecup for Nikon Zfc Digital Camera 27216 B&H