The Ladybug is 2mm thick, one of the thinnest offerings by Spyderco.
The hollow ground Gayle Bradley folders are very thin behind the edge due to the hollow grind.
This is from the Spyderco Forum:
Behind Edge / Spine / Blade Stock
Advocate - .023 / .116 / .117
Baby Horn Sprint - .014 / .080 / .090
Bradley Junction: 0.097” thick stock / 0.020” BTE,
Caly 3 HAP40 Sprint - .022 / .111 / .116
Caly 3.5 ZDP189 CF - .0225 / .107 / .116
Caribbean PE Leaf: Spine thickness: 3.42 mm/0.134” 0.44mm/0.017” BTE
Cat 440C - .020 / .096 / .102
Chaparral CF - .013 / .077 / .077
Chaparral LW - .0175 / .073 / .0775
Chaparral FRN: Stock: 0.079", Plunge: 0.019", Mid blade 0.019", Tip: 0.019"
Cricket Blue Nishijin - .015 / .078 / .0785
Delica V-TOKU 2 Sprint - .019 / .092 / .096
Delica Pakkawood-HAP40 KC Exc. - .017 / .086 / .096
Delica (FFG) - Blue - .028 / .096 / .096
Delica SNK Exclusive-Red G10/TiCN - .022 / .090 / .0965
Delica (FFG) - Orange - .028 / .096 / .096
Delica WC HAP40 Sprint - .020 / .091 / .096
Delica Bento Box Shop M390: Spine: 0.095" Edge thickness: 0.027"
Delica HAP40 Jazzlica: 0.018/0.018/0.016 stock thickness 0.096
Delica Super Gold : 0.018/0.018/0.018 stock thickness 0.096
Delica exclusive CPM Cru-wear: Stock thickness: 2.44 mm BTE: 0.025"
Dragonfly HAP40 - .019 / .096 / .096
Dragonfly Pakkawood-HAP40 KC Exc. - .020 / .0965 / .0965
Dragonfly VG10 - .020 / .096 / .096
Dragonfly Salt HB SE - .031 / .0965 / .0965
Dragonfly G10/VG10 - .020 / .096 / .096
Emphasis: Blade thickness - 0.118" Half inch from the tip - 0.026" (0.6604mm) Mid-blade - 0.025" (0.635mm), Half inch from the plunge grind - 0.024" (0.6096mm)
Endura HAP40: 2.70mm/0.106” spine, 0.55mm/0.023” BTE
Firefly - .024 / .118 / .118
Gayle Bradley 1 - .021 / .118 / .118
Kapara: 0.020/0.020/0.020 stock thickness 0.115
Kapara: Stock: 0.118", Plunge: 0.022", Mid blade 0.020", Tip: 0.022"
Ladybug ZDP-189 - .017 / .077 / .077
Lil Matriarch BBS Exc. - .023 / .0985 / .0985
Lil'Native backlock #1: 0.019/0.019/0.020 stock thickness 0.126
Lil'Native backlock #2: 0.021/0.020/0.022 stock thickness 0.126
Lil' Native SNK 4V: Blade stock thickness: .125" BTE: .022" avg
Manbug ZDP-189 - .019 / .094 / .098
Manbug HAP40 - .018 / .087 / .096
Manbug HAP40: Spine (in front of plunge line) 2.08mm/0.082” 0.40mm/0.015” BTE
Manix 2 G10/S30V - .023 / .116 / .125
Manix 2 52100 KW Exclusive - .024 / .120 / .125
Manix 2 LW BD1 Trans Blue - .024 / .124 / .125
Manix 2 LW S110V
Manix 2 LW BD1 Black - .026 / .125 / .125
Manix 2 LW XHP - .023 / .115 / .125
Manix 2 52100: 3.05mm/0.121” spine, 0.57mm/0.023” BTE
Manix 2 Brown XHP: 0.022/0.027/0.029 stock thickness 0.125
Manix 2 Blue g10 sprint: Stock: 0.125", Plunge: 0.025", Mid blade 0.032", Tip 0.037"
Mantra - .0175 / .116 / .118
McBee: Spine - .118", BTE - .030"
Military Lefty: 3.46mm/0.136” spine 0.58mm/0.022” BTE
Military Rex45: Spine - 0.140" BTE - 0.022"
Mule Team 26 PMA11: Spine - 0.114" BTE - 0.20"
Mule PMA11: 0.016/0.018/0.019 stock thickness 0.119
Native 5 G10 S35VN - .026 / .126 / .126
Native 5 2013 Forum - .022 / .126 / .126
Native 5 LW S35VN - .026 / .126 / .126
Native 5 LW 2015 Forum Knife- .026 / .125 / .1255
Native 5 40th Ann - .022 / .126 / .126
PM2 Blk/DLC - .0285 / .145 / .145
PM2 M390 DLT Exc. - .023 / .1405 / .145
PM2 Cruwear - .028 / .145 / .145
PM2 Cruwear: 3.48mm/0.137” spine, 0.54mm/0.022” BTE
PM2 M4/CF - .025 / .1435 / .1435
PM2 CRUWEAR - .025 / .1455 / .1455
PM2 Forum Knife 2018 S90V: Spine - 0.136" BTE - 0.021
PM2 Rex 45: 0.019/0.020/0.022 stock thickness 0.14
PM2 River's Edge Cutlery Exclusive (Coyote Brown G10, CPM 10V): BTE: 0.0236"
PM2 204P Knifeworks exclusive: Stock: 0.138", Plunge: 0.025", Mid blade: 0.022", Tip: 0.023"
Para 3 Rex 45: 0.018/0.019/0.018 stock thickness 0.145
Para 3 Cruwear Sprint - .0225 / .140 / .144
Para 3 - .025 / .145 / .145
Para 3 M390 BBS Exc. - .0235 / .143 / .145
Para 3 Maxamet: 3.53mm/0.139” spine, 0.54mm/0.021” BTE
Police 4 K390: Spine - 0.105" BTE - 0.023"
Police 4 K390: 0.110" stock 0.030"bte
Positron KC Exclusive - .016 / .117 / .117
Sage 1 - .020 / .111 / .117
Sage 2 - .0205 / .116 / .117
Sage 3 - .020 / .116 / .117
Sage 5 - .019 / .111 / .116
Shaman 4V: 0.144" spine 0.025" bte
Shaman Cruwear/Micarta: 0.026", 0.025", 0.024" bte
Shaman Cruwear/Micarta: 0.021/0.023/0.023 stock thickness 0.145
Sliverax
Stretch 2 G10 ZDP: 0.023/0.025/0.025 stock thickness 0.111
Stretch LW VG10 - .025 / .117 / .117
Stretch LW HAP40 - .023 / .109 / .1155
Swick (Original) 0.022/0.028/0.026 stock thickness 0.155
Urban K390 Sprint - .015 / .106 / .112
Urban K390: 2.75mm/0.109” spine, 0.35mm/0.015” BTE
Urban G10/VG10 - .031 / .112 / .118
Urban K390: Stock: 0.112", Plunge: 0.016", Mid blade 0.016", Tip: 0.017"
UKPK G10 S30V - .020 / .118 / .125
UKPK LW S110V
Waterway: 3.03mm/0.119" spine, 0.62mm/.023"
Waterway: .119" at the spine and .012" BTE .