Plain white envelope works for me, most of these cards are pretty cheap so not looking to break the bank.
2013 Topps Archives Gold #115
2013 Topps Gypsy Queen Mini Green #112
2013 Topps Opening Day Blue #98
2014 Classics Timeless Tributes Silver #103
2014 Diamondbacks Topps #ARI1
2014 Topps Chipz Silver #30
2014 Topps Chrome Blue Refractors #125
2014 Topps Heritage Chrome #463
2015 Bowman Green #20
2015 Bowman Purple #20
2015 Diamondbacks Topps #AD1
2015 Diamond Kings Framed Blue #111
2015 Diamond Kings Silver #111
2015 Donruss Hot off the Press #1
2015 Donruss Hot off the Press #46
2015 Donruss Press Proofs Silver #1
2015 Donruss Press Proofs Silver #46
2015 Donruss Stat Line Career #1 DK/292
2015 Elite 21st Century #50
2015 Elite All Star Salutes #16
2015 Panini Prizm Prizms Blue #128
2015 Panini Prizm Prizms Red Power #128
2015 Stadium Club Contact Sheet #CS14
2015 Stadium Club Contact Sheet white
2015 Stadium Club True Colors Refractors #TC08
2015 Topps Archives Gold #138
2015 Topps Chipz Black #33
2015 Topps Chipz Black Red Foil #33
2015 Topps Chipz Blue #33
2015 Topps Gypsy Queen Framed Bronze #16
2015 Topps Museum Collection Copper #36
2015 Topps Museum Collection Green #36
2013 Topps Archives Gold #115
2013 Topps Gypsy Queen Mini Green #112
2013 Topps Opening Day Blue #98
2014 Classics Timeless Tributes Silver #103
2014 Diamondbacks Topps #ARI1
2014 Topps Chipz Silver #30
2014 Topps Chrome Blue Refractors #125
2014 Topps Heritage Chrome #463
2015 Bowman Green #20
2015 Bowman Purple #20
2015 Diamondbacks Topps #AD1
2015 Diamond Kings Framed Blue #111
2015 Diamond Kings Silver #111
2015 Donruss Hot off the Press #1
2015 Donruss Hot off the Press #46
2015 Donruss Press Proofs Silver #1
2015 Donruss Press Proofs Silver #46
2015 Donruss Stat Line Career #1 DK/292
2015 Elite 21st Century #50
2015 Elite All Star Salutes #16
2015 Panini Prizm Prizms Blue #128
2015 Panini Prizm Prizms Red Power #128
2015 Stadium Club Contact Sheet #CS14
2015 Stadium Club Contact Sheet white
2015 Stadium Club True Colors Refractors #TC08
2015 Topps Archives Gold #138
2015 Topps Chipz Black #33
2015 Topps Chipz Black Red Foil #33
2015 Topps Chipz Blue #33
2015 Topps Gypsy Queen Framed Bronze #16
2015 Topps Museum Collection Copper #36
2015 Topps Museum Collection Green #36