157 known values for skin with current usage counts:

1. default (22264× used)
2. red (16744× used)
3. green (11200× used)
4. follower (4284× used)
5. clown (1175× used)
6. trapper (1079× used)
7. cool_cap (949× used)
8. vampire (876× used)
9. lab_apprentice (802× used)
10. daisy (684× used)
11. helmet_banana (553× used)
12. snowman (550× used)
13. og_white (476× used)
14. anniversary (453× used)
15. rural_fella (413× used)
16. party_hat (396× used)
17. gingerbread (306× used)
18. panda (227× used)
19. gift_box (222× used)
20. monk (215× used)
21. pumpkin (211× used)
22. black_dog (194× used)
23. og_purple (184× used)
24. dog (167× used)
25. builder (163× used)
26. anniversary_2 (162× used)
27. edm (159× used)
28. toaster (141× used)
29. demon (138× used)
30. tea_cup (127× used)
31. og_yellow (119× used)
32. cyborg_3 (109× used)
33. og_pink (108× used)
34. cyborg_1 (91× used)
35. reindeer (89× used)
36. grim_reaper (88× used)
37. bad_cap (88× used)
38. green_spikes (86× used)
39. elf (84× used)
40. detective (73× used)
41. king (70× used)
42. wizard (67× used)
43. evil_bot (66× used)
44. narwhal (63× used)
45. mad_scientist (63× used)
46. cubix (63× used)
47. grey_cat (60× used)
48. joker (60× used)
49. white_demon (57× used)
50. orca (57× used)
51. eliminated (57× used)
52. sushi (54× used)
53. headset (53× used)
54. yeti (52× used)
55. peach (49× used)
56. mummy (49× used)
57. cat (49× used)
58. spikes (48× used)
59. rplace (48× used)
60. parrot (46× used)
61. security_bot (44× used)
62. ninja (43× used)
63. shades (42× used)
64. fries (41× used)
65. anniversary_3 (40× used)
66. lunar_dragon (38× used)
67. murica (37× used)
68. siren (37× used)
69. angel (36× used)
70. alien (34× used)
71. wolf (33× used)
72. bow_tie (33× used)
73. top_hat (32× used)
74. cyborg_2 (31× used)
75. icefox (31× used)
76. country_nl (30× used)
77. ghost (28× used)
78. devil (28× used)
79. astronaut (27× used)
80. shark_attack (25× used)
81. ramen (23× used)
82. whale (22× used)
83. festive_lights (22× used)
84. rabbit (22× used)
85. treasure_chest (20× used)
86. apple (20× used)
87. monkey (20× used)
88. bee_costume (19× used)
89. bandit (18× used)
90. tiger (18× used)
91. country_us (17× used)
92. blue_dinosaur (17× used)
93. banana (17× used)
94. country_de (17× used)
95. cow (16× used)
96. block (16× used)
97. firefox (16× used)
98. bunny_costume (16× used)
99. scuba_diver (15× used)
100. science_adept (15× used)
101. curious_bot (15× used)
102. boby (14× used)
103. country_fr (13× used)
104. mecha (13× used)
105. country_se (12× used)
106. country_pl (12× used)
107. country_gb (12× used)
108. shape (12× used)
109. leprechaun (12× used)
110. burger (12× used)
111. pirate (12× used)
112. fairy (11× used)
113. dinosaur (11× used)
114. country_au (11× used)
115. carrot_costume (11× used)
116. polar_bear (11× used)
117. country_il (10× used)
118. steampunk (10× used)
119. burglar (10× used)
120. spy (9× used)
121. country_fi (9× used)
122. country_be (9× used)
123. graffiti (8× used)
124. country_no (8× used)
125. fossil (8× used)
126. cardboard_box (8× used)
127. pig (7× used)
128. country_ro (7× used)
129. unicorn (7× used)
130. country_cz (7× used)
131. hamster (7× used)
132. country_it (6× used)
133. nutcracker (6× used)
134. firefighter (6× used)
135. country_gr (6× used)
136. mark (6× used)
137. red_cocoa (6× used)
138. buffalo (5× used)
139. country_hu (5× used)
140. country_es (5× used)
141. country_ca (5× used)
142. pineapple (4× used)
143. green_cocoa (4× used)
144. country_ru (4× used)
145. country_ch (4× used)
146. jailbreak (4× used)
147. yellow_crown (4× used)
148. country_si (3× used)
149. country_hr (3× used)
150. stinger (3× used)
151. alice (3× used)
152. popcorn (3× used)
153. white_crown (1× used)
154. blue_crown (1× used)
155. black_crown (1× used)
156. alfie (1× used)
157. laurel (1× used)